Build events-kafka on its own stable-3.4 branch

Also reorder the branch names, starting
from the newer one and going in descendant
order, consistently to all the other plugins'
YAML files.

Change-Id: I265b98103a471314fe7186c72e6bc44e724d0d47
diff --git a/jenkins/gerrit-bazel-plugin-events-kafka.yaml b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
index 9c5c083..661c545 100644
--- a/jenkins/gerrit-bazel-plugin-events-kafka.yaml
+++ b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
@@ -1,15 +1,12 @@
 - project:
     name: events-kafka
     jobs:
-      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
-          branch:
-            - master
-          gerrit-branch:
-            - stable-3.4
       - 'plugin-{name}-bazel-{branch}':
           branch:
-            - stable-2.16
-            - stable-3.1
-            - stable-3.2
+            - master
+            - stable-3.4
             - stable-3.3
+            - stable-3.2
+            - stable-3.1
+            - stable-2.16
       - 'plugin-{name}-verifier'