Install newer gerritlib to fix gerrit 2.12.4+
diff --git a/gerrit/client/service.sls b/gerrit/client/service.sls
index 1c9c26c..a9b0a7d 100644
--- a/gerrit/client/service.sls
+++ b/gerrit/client/service.sls
@@ -17,7 +17,7 @@
   pip.installed:
     - names:
       - pygerrit
-      - gerritlib
+      - "git+https://github.com/openstack-infra/gerritlib.git"
       - "git+https://github.com/openstack-infra/jeepyb.git"
     - require:
       - pkg: gerrit_python_pip