Build events-broker on its own stable-3.4 branch

Change-Id: I642beea7078305418dce646ac23cb2b9a3b8c4b1
diff --git a/jenkins/gerrit-bazel-module-events-broker.yaml b/jenkins/gerrit-bazel-module-events-broker.yaml
index ba2f3f3..26e424a 100644
--- a/jenkins/gerrit-bazel-module-events-broker.yaml
+++ b/jenkins/gerrit-bazel-module-events-broker.yaml
@@ -3,13 +3,9 @@
     jobs:
       - 'module-{name}-bazel-{branch}':
           branch:
+            - master
+            - stable-3.4
             - stable-3.3
             - stable-3.2
             - stable-3.1
-      - 'module-{name}-bazel-{branch}-{gerrit-branch}':
-          branch:
-            - master
-          gerrit-branch:
-            - master
-            - stable-3.4
       - 'module-{name}-verifier'