cloud-notifications: add 2.15 build branch

Change-Id: I44b0ad01a15a820b2b4c60781afa2808343ff3e0
Signed-off-by: Jorge Ruesga <j.ruesga.criado@gmail.com>
diff --git a/jenkins/gerrit-buck-bazel-plugin-cloud-notifications.yaml b/jenkins/gerrit-buck-bazel-plugin-cloud-notifications.yaml
index 055e3ba..e734a2a 100644
--- a/jenkins/gerrit-buck-bazel-plugin-cloud-notifications.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-cloud-notifications.yaml
@@ -4,9 +4,8 @@
       - 'plugin-{name}-{branch}':
           branch:
             - stable-2.13
-      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
-          gerrit-branch:
-            - master
-            - stable-2.14
+      - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-2.14
+            - stable-2.15
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