Switch the launcher to Gearman.

Remove the Jenkins launcher and add a new Gearman launcher (designed
to be compatible with Jenkins) in its place.

See the documentation for how to set up the Gearman Plugin for
Jenkins.

Change-Id: Ie7224396271d7375f4ea42eebb57f883bc291738
diff --git a/tests/fixtures/layout.yaml b/tests/fixtures/layout.yaml
index ecdd2da..8d6c852 100644
--- a/tests/fixtures/layout.yaml
+++ b/tests/fixtures/layout.yaml
@@ -1,3 +1,6 @@
+includes:
+  - python-file: custom_functions.py
+
 pipelines:
   - name: check
     manager: IndependentPipelineManager
@@ -46,6 +49,8 @@
   - name: project-testfile
     files:
       - '.*-requires'
+  - name: node-project-test1
+    parameter-function: select_debian_node
 
 project-templates:
   - name: test-one-and-two
@@ -135,3 +140,9 @@
     template:
      - name: test-one-and-two
        projectname: project
+
+  - name: org/node-project
+    gate:
+      - node-project-merge:
+        - node-project-test1
+        - node-project-test2