Build verify-status plugin on stable-3.1

This change also does the following:

o drops build on stable-3.0/3.2
o add build for stable-3.3

Change-Id: I74867d848e00db6ae9f47f2642ca01d2656fc74b
diff --git a/jenkins/gerrit-bazel-plugin-verify-status.yaml b/jenkins/gerrit-bazel-plugin-verify-status.yaml
index fb4a9ba..911b167 100644
--- a/jenkins/gerrit-bazel-plugin-verify-status.yaml
+++ b/jenkins/gerrit-bazel-plugin-verify-status.yaml
@@ -3,12 +3,11 @@
     jobs:
       - 'plugin-{name}-bazel-{branch}':
           branch:
+            - stable-3.1
             - stable-2.16
       - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch:
             - master
           gerrit-branch:
             - master
-            - stable-3.2
-            - stable-3.1
-            - stable-3.0
+            - stable-3.3