Add repos from gerrit.googlesource.com to zuul

Pull them in without job config to be safe.

Change-Id: I3829800c24d63cc699888fe7217553be22285fdf
Depends-On: https://review.openstack.org/630740

zuul/main.yaml

@@ -1513,3 +1513,14 @@
               - sigmavirus24/github3.py
               - sqlalchemy/dogpile.cache
               - swiftstack/ProxyFS
+      googlesource:
+        untrusted-projects:
+          - include: []
+            projects:
+              - gerrit
+              - plugins/delete-project
+              - plugins/importer
+              - plugins/its-base
+              - plugins/its-storyboard
+              - plugins/javamelody
+              - plugins/verify-status