Add jobs to build gerrit master branch

We'll use this to test the checks plugin.

We have to add jgit as a repo because it's a submodule now.

Change-Id: Ic7e9ad0265e136a9ac6b1147998f6eb5ee398180

.zuul.yaml

@@ -377,6 +377,69 @@
     parent: system-config-promote-image
     vars: *gerrit_vars_3_0
     files: *gerrit_files_3_0
+
+# Gerrit master jobs
+- job:
+    name: system-config-build-image-gerrit-master
+    description: Build a gerrit image.
+    parent: system-config-build-image
+    pre-run:
+      - playbooks/zuul/gerrit/repos.yaml
+      - playbooks/zuul/gerrit/jgit.yaml
+    required-projects: &gerrit_projects_master
+      - gerrit.googlesource.com/jgit
+      - gerrit.googlesource.com/gerrit
+      - gerrit.googlesource.com/plugins/codemirror-editor
+      - gerrit.googlesource.com/plugins/commit-message-length-validator
+      - gerrit.googlesource.com/plugins/delete-project
+      - gerrit.googlesource.com/plugins/download-commands
+      - gerrit.googlesource.com/plugins/gitiles
+      - gerrit.googlesource.com/plugins/hooks
+      - gerrit.googlesource.com/plugins/its-base
+      - gerrit.googlesource.com/plugins/its-storyboard
+      - gerrit.googlesource.com/plugins/javamelody
+      - gerrit.googlesource.com/plugins/plugin-manager
+      - gerrit.googlesource.com/plugins/replication
+      - gerrit.googlesource.com/plugins/reviewnotes
+      - gerrit.googlesource.com/plugins/singleusergroup
+      - gerrit.googlesource.com/plugins/webhooks
+    vars: &gerrit_vars_master
+      docker_images:
+        - context: docker/gerrit/bazel
+          repository: opendevorg/gerrit
+          path: /home/zuul/src/gerrit.googlesource.com/gerrit
+          tags:
+            - master
+      gerrit_additional_plugins:
+        - codemirror-editor
+        - delete-project
+        - gitiles
+        - plugin-manager
+        - webhooks
+    files: &gerrit_files_master
+      - docker/bazel/.*
+      - docker/gerrit/base/.*
+      - docker/gerrit/bazel/.*
+      - playbooks/zuul/gerrit/.*
+
+- job:
+    name: system-config-upload-image-gerrit-master
+    description: Build and upload a gerrit image.
+    parent: system-config-upload-image
+    pre-run:
+      - playbooks/zuul/gerrit/repos.yaml
+      - playbooks/zuul/gerrit/jgit.yaml
+    required-projects: *gerrit_projects_master
+    vars: *gerrit_vars_master
+    files: *gerrit_files_master
+
+- job:
+    name: system-config-promote-image-gerrit-master
+    description: Promote a previously published gerrit image to latest.
+    parent: system-config-promote-image
+    vars: *gerrit_vars_master
+    files: *gerrit_files_master
+
 # python-builder jobs
 - job:
     name: system-config-build-image-python-builder
@@ -1014,6 +1077,12 @@
                 soft: true
               - name: system-config-build-image-gerrit-base
                 soft: true
+        - system-config-build-image-gerrit-master:
+            dependencies:
+              - name: system-config-build-image-bazel
+                soft: true
+              - name: system-config-build-image-gerrit-base
+                soft: true
         - system-config-build-image-haproxy-statsd
         - system-config-build-image-python-base
         - system-config-build-image-python-builder
@@ -1067,6 +1136,12 @@
                 soft: true
               - name: system-config-upload-image-gerrit-base
                 soft: true
+        - system-config-upload-image-gerrit-master:
+            dependencies:
+              - name: system-config-upload-image-bazel
+                soft: true
+              - name: system-config-upload-image-gerrit-base
+                soft: true
         - system-config-upload-image-haproxy-statsd
         - system-config-upload-image-python-base
         - system-config-upload-image-python-builder
@@ -1081,6 +1156,7 @@
         - system-config-promote-image-gerrit-2.15
         - system-config-promote-image-gerrit-2.16
         - system-config-promote-image-gerrit-3.0
+        - system-config-promote-image-gerrit-master
         - system-config-promote-image-haproxy-statsd
         - system-config-promote-image-python-base
         - system-config-promote-image-python-builder

playbooks/zuul/gerrit/jgit.yaml

@@ -0,0 +1,7 @@
+- hosts: all
+  tasks:
+
+    - name: Checkout jgit submodule
+      command: "git submodule update --init modules/jgit"
+      args:
+        chdir: /home/zuul/src/gerrit.googlesource.com/gerrit