Fix building plugins/events-rabbitmq

It depends on modules/events-broker so add that as a requirement.

Change-Id: I1ad5b42d366e03cdf39359b19cd1a7cb766e8e14
diff --git a/jenkins/gerrit-bazel-plugin-events-rabbitmq.yaml b/jenkins/gerrit-bazel-plugin-events-rabbitmq.yaml
index 3c5ea6c..1ca61e0 100644
--- a/jenkins/gerrit-bazel-plugin-events-rabbitmq.yaml
+++ b/jenkins/gerrit-bazel-plugin-events-rabbitmq.yaml
@@ -2,9 +2,11 @@
     name: events-rabbitmq
     jobs:
       - 'plugin-{name}-bazel-{branch}':
+          extra-modules: 'events-broker'
           branch:
             - master
       - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
+          extra-modules: 'events-broker'
           branch:
             - master
           gerrit-branch: