Handle x/ prefix projects on gerrit 3.2

Gerrit seems to handle x/ for plugin extensions in polygerrit.
Unfortunately we've got projects called x/* and that breaks cloning of
these projects. Lets just avoid that for nwo until we can do a rename.

Change-Id: Id01739725c22af9d02ac30b1653743b49a35a332

playbooks/zuul/gerrit/run.yaml

@@ -1,3 +1,10 @@
+- hosts: all
+  tasks:
+    - shell: |
+        cd /home/zuul/src/gerrit.googlesource.com/gerrit
+        # Disable the x/ redirection since we have x/ projects
+        sed -i -e 's|"/x/\*"\,$|//"/x/*",|g' java/com/google/gerrit/httpd/raw/StaticModule.java
+
 - hosts: all
   roles:
     - role: bazelisk-build