Fix files matcher and bazel for gerrit base image

Use latest bazel

It seems 0.27 is now too old. This is what happens when I go on vacation
apparently.

Add in a hack to override the bazelversion. We'll remove this once
https://gerrit-review.googlesource.com/c/gerrit/+/237495 lands and
has been merged up.

Change-Id: Ib7a6d33ce8bf8498fd5cd09b25087dc09acb8df4

.zuul.yaml

@@ -463,7 +463,7 @@
         - context: docker/gerrit/base
           repository: opendevorg/gerrit-base
     files: &gerrit-base_files
-      - docker/gerrit-base/.*
+      - docker/gerrit/base/.*
 
 - job:
     name: system-config-upload-image-gerrit-base

docker/bazel/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM l.gcr.io/google/bazel:0.27.1 as bazel
+FROM l.gcr.io/google/bazel:0.29.1 as bazel
 
 # The bazel image comes with bazel only runnable by root for some weird reason.
 # The bower build in gerrit does not work as root.

docker/gerrit/base/Dockerfile

@@ -20,7 +20,7 @@ RUN apt-get update \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
 
-# 3000 is what the existing opendev gerrit2 user is
+# 3000 is what the existing opendev gerrit2 uid is
 RUN addgroup gerrit --gid 3000 --system \
   && adduser \
     --system \

playbooks/zuul/gerrit/repos.yaml

@@ -1,5 +1,6 @@
 - hosts: all
   tasks:
+
     - name: Move plugin repos into gerrit tree
       command: "mv -f {{ item }} ../gerrit/plugins"
       args:
@@ -52,3 +53,9 @@
       command: "mv docker/gerrit/bazel/build-gerrit.sh /home/zuul/src/gerrit.googlesource.com/gerrit"
       args:
         chdir: /home/zuul/src/opendev.org/opendev/system-config
+
+    # TODO(mordred) Remove this line when
+    # https://gerrit-review.googlesource.com/c/gerrit/+/237495
+    # lands.
+    - name: Overwrite bazel version
+      shell: "echo 0.29.1 > /home/zuul/src/gerrit.googlesource.com/gerrit/.bazelversion"