Rename zuul-launcher to zuul-executor

To avoid confusion with nodepool-launcher, we've decided to rename
zuul-launcher to zuul-executor.

Change-Id: I7d03cf0f0093400f4ba2e4beb1c92694224a3e8c
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/tests/fixtures/zuul-connections-multiple-gerrits.conf b/tests/fixtures/zuul-connections-multiple-gerrits.conf
index c1a335d..b3182d7 100644
--- a/tests/fixtures/zuul-connections-multiple-gerrits.conf
+++ b/tests/fixtures/zuul-connections-multiple-gerrits.conf
@@ -12,8 +12,8 @@
 git_user_name=zuul
 zuul_url=http://zuul.example.com/p
 
-[launcher]
-git_dir=/tmp/zuul-test/launcher-git
+[executor]
+git_dir=/tmp/zuul-test/executor-git
 
 [connection review_gerrit]
 driver=gerrit
diff --git a/tests/fixtures/zuul-connections-same-gerrit.conf b/tests/fixtures/zuul-connections-same-gerrit.conf
index 5c10444..69f5239 100644
--- a/tests/fixtures/zuul-connections-same-gerrit.conf
+++ b/tests/fixtures/zuul-connections-same-gerrit.conf
@@ -12,8 +12,8 @@
 git_user_name=zuul
 zuul_url=http://zuul.example.com/p
 
-[launcher]
-git_dir=/tmp/zuul-test/launcher-git
+[executor]
+git_dir=/tmp/zuul-test/executor-git
 
 [connection review_gerrit]
 driver=gerrit
diff --git a/tests/fixtures/zuul-git-driver.conf b/tests/fixtures/zuul-git-driver.conf
index 868e272..936c530 100644
--- a/tests/fixtures/zuul-git-driver.conf
+++ b/tests/fixtures/zuul-git-driver.conf
@@ -12,8 +12,8 @@
 git_user_name=zuul
 zuul_url=http://zuul.example.com/p
 
-[launcher]
-git_dir=/tmp/zuul-test/launcher-git
+[executor]
+git_dir=/tmp/zuul-test/executor-git
 
 [swift]
 authurl=https://identity.api.example.org/v2.0/
diff --git a/tests/fixtures/zuul.conf b/tests/fixtures/zuul.conf
index f0b6068..516ce08 100644
--- a/tests/fixtures/zuul.conf
+++ b/tests/fixtures/zuul.conf
@@ -12,8 +12,8 @@
 git_user_name=zuul
 zuul_url=http://zuul.example.com/p
 
-[launcher]
-git_dir=/tmp/zuul-test/launcher-git
+[executor]
+git_dir=/tmp/zuul-test/executor-git
 
 [swift]
 authurl=https://identity.api.example.org/v2.0/