Build Gerrit 3.3.7 images

This updates our Gerrit 3.3 images to the new 3.3.7 release.

Change-Id: Ib676be49bcc9cd4633dbe6fe87dd6e3a32185a55

docker/gerrit/base/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Mon Oct 11 15:30:36 UTC 2021 - trigger rebuild
+# Thu Oct 14 18:42:52 UTC 2021 - trigger rebuild
 
 FROM docker.io/opendevorg/python-builder:3.9-bullseye as builder
 

zuul.d/docker-images/gerrit.yaml

@@ -57,9 +57,9 @@
         override-checkout: stable-3.3
       # Plugins common to every build with branches or refs for every build
       - name: gerrit.googlesource.com/plugins/commit-message-length-validator
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/hooks
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/its-base
         # There is no 3.3 branch
         override-checkout: master
@@ -72,30 +72,30 @@
       - name: gerrit.googlesource.com/plugins/replication
         override-checkout: stable-3.3
       - name: gerrit.googlesource.com/plugins/reviewnotes
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       # Plugins common to every build without branches or refs for every build
       - name: gerrit.googlesource.com/plugins/download-commands
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/singleusergroup
         override-checkout: stable-3.3
       # Plugins not common to every build
       - name: gerrit.googlesource.com/plugins/codemirror-editor
-        override-checkout: v3.3.6
+        override-checkout: stable-3.3
       - name: gerrit.googlesource.com/plugins/delete-project
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/gitiles
         override-checkout: stable-3.3
       - name: gerrit.googlesource.com/plugins/plugin-manager
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/webhooks
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
       - name: gerrit.googlesource.com/plugins/zuul-results-summary
         override-checkout: main
       # Non plugin submodules
       - name: gerrit.googlesource.com/jgit
         override-checkout: master
       - name: gerrit.googlesource.com/polymer-bridges
-        override-checkout: v3.3.6
+        override-checkout: v3.3.7
     vars: &gerrit_vars_3_3
       docker_images:
         - context: docker/gerrit/bazel