Add support for negative requirements

This change adds support for false matching of requirements. To make
this useful you can now require all approvals match a requirement or
only one (ie any).

Therefore depreciate require-approvals, replacing with
require-approvals-any and a new require-approvals-all.

Change-Id: I458e677315ccb90d64cd0c0e734951141324a9c3
diff --git a/tests/fixtures/layout-requirement-all.yaml b/tests/fixtures/layout-requirement-all.yaml
new file mode 100644
index 0000000..968739d
--- /dev/null
+++ b/tests/fixtures/layout-requirement-all.yaml
@@ -0,0 +1,41 @@
+pipelines:
+  - name: pipeline
+    manager: IndependentPipelineManager
+    require:
+      all-approvals:
+        - username: jenkins
+          verified: [1, 2]
+        - verified: "![-1, -2]"
+    trigger:
+      gerrit:
+        - event: comment-added
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+  - name: trigger
+    manager: IndependentPipelineManager
+    trigger:
+      gerrit:
+        - event: comment-added
+          require-all-approvals:
+            - username: jenkins
+              verified: [1, 2]
+            - verified: "![-1, -2]"
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+projects:
+  - name: org/project1
+    pipeline:
+      - project1-pipeline
+  - name: org/project2
+    trigger:
+      - project2-trigger
diff --git a/tests/fixtures/layout-requirement-any.yaml b/tests/fixtures/layout-requirement-any.yaml
new file mode 100644
index 0000000..6275d8d
--- /dev/null
+++ b/tests/fixtures/layout-requirement-any.yaml
@@ -0,0 +1,43 @@
+pipelines:
+  - name: pipeline
+    manager: IndependentPipelineManager
+    require:
+      any-approval:
+        - username: jenkins
+          verified: [1, 2]
+        - username: core-reviewer
+          code-review: "![-1, -2]"
+    trigger:
+      gerrit:
+        - event: comment-added
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+  - name: trigger
+    manager: IndependentPipelineManager
+    trigger:
+      gerrit:
+        - event: comment-added
+          require-any-approval:
+            - username: jenkins
+              verified: [1, 2]
+            - username: core-reviewer
+              code-review: "![-1, -2]"
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+projects:
+  - name: org/project1
+    pipeline:
+      - project1-pipeline
+  - name: org/project2
+    trigger:
+      - project2-trigger
diff --git a/tests/fixtures/layout-requirement-email.yaml b/tests/fixtures/layout-requirement-email.yaml
index 4bfb733..dadcd6c 100644
--- a/tests/fixtures/layout-requirement-email.yaml
+++ b/tests/fixtures/layout-requirement-email.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - email: jenkins@example.com
     trigger:
       gerrit:
@@ -19,7 +19,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - email: jenkins@example.com
     success:
       gerrit:
diff --git a/tests/fixtures/layout-requirement-negative-username.yaml b/tests/fixtures/layout-requirement-negative-username.yaml
new file mode 100644
index 0000000..f542b86
--- /dev/null
+++ b/tests/fixtures/layout-requirement-negative-username.yaml
@@ -0,0 +1,37 @@
+pipelines:
+  - name: pipeline
+    manager: IndependentPipelineManager
+    require:
+      all-approvals:
+        - username: '!jenkins'
+    trigger:
+      gerrit:
+        - event: comment-added
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+  - name: trigger
+    manager: IndependentPipelineManager
+    trigger:
+      gerrit:
+        - event: comment-added
+          require-all-approvals:
+            - username: '!jenkins'
+    success:
+      gerrit:
+        verified: 1
+    failure:
+      gerrit:
+        verified: -1
+
+projects:
+  - name: org/project1
+    pipeline:
+      - project1-pipeline
+  - name: org/project2
+    trigger:
+      - project2-trigger
\ No newline at end of file
diff --git a/tests/fixtures/layout-requirement-newer-than.yaml b/tests/fixtures/layout-requirement-newer-than.yaml
index b6beb35..f723c79 100644
--- a/tests/fixtures/layout-requirement-newer-than.yaml
+++ b/tests/fixtures/layout-requirement-newer-than.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
           newer-than: 48h
     trigger:
@@ -20,7 +20,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
               newer-than: 48h
     success:
diff --git a/tests/fixtures/layout-requirement-older-than.yaml b/tests/fixtures/layout-requirement-older-than.yaml
index 2edf9df..0e011cc 100644
--- a/tests/fixtures/layout-requirement-older-than.yaml
+++ b/tests/fixtures/layout-requirement-older-than.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
           older-than: 48h
     trigger:
@@ -20,7 +20,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
               older-than: 48h
     success:
diff --git a/tests/fixtures/layout-requirement-username.yaml b/tests/fixtures/layout-requirement-username.yaml
index 7a549f0..8520179 100644
--- a/tests/fixtures/layout-requirement-username.yaml
+++ b/tests/fixtures/layout-requirement-username.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
     trigger:
       gerrit:
@@ -19,7 +19,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
     success:
       gerrit:
diff --git a/tests/fixtures/layout-requirement-vote.yaml b/tests/fixtures/layout-requirement-vote.yaml
index 7ccadff..6736e98 100644
--- a/tests/fixtures/layout-requirement-vote.yaml
+++ b/tests/fixtures/layout-requirement-vote.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
           verified: 1
     trigger:
@@ -20,7 +20,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
               verified: 1
     success:
diff --git a/tests/fixtures/layout-requirement-vote1.yaml b/tests/fixtures/layout-requirement-vote1.yaml
index 7ccadff..6736e98 100644
--- a/tests/fixtures/layout-requirement-vote1.yaml
+++ b/tests/fixtures/layout-requirement-vote1.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
           verified: 1
     trigger:
@@ -20,7 +20,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
               verified: 1
     success:
diff --git a/tests/fixtures/layout-requirement-vote2.yaml b/tests/fixtures/layout-requirement-vote2.yaml
index 33d84d1..a6cd6a3 100644
--- a/tests/fixtures/layout-requirement-vote2.yaml
+++ b/tests/fixtures/layout-requirement-vote2.yaml
@@ -2,7 +2,7 @@
   - name: pipeline
     manager: IndependentPipelineManager
     require:
-      approval:
+      any-approval:
         - username: jenkins
           verified: [1, 2]
     trigger:
@@ -20,7 +20,7 @@
     trigger:
       gerrit:
         - event: comment-added
-          require-approval:
+          require-any-approval:
             - username: jenkins
               verified: [1, 2]
     success: