Workaround provisioning of gerrit user

Change-Id: I106bc59c9e022aeb2be8d1ab1f0d5935344616a8
diff --git a/gerrit/client/init.yml b/gerrit/client/init.yml
index 7dd6c77..ed4b1d6 100644
--- a/gerrit/client/init.yml
+++ b/gerrit/client/init.yml
@@ -1,9 +1,12 @@
 classes:
   - service.gerrit.client
 parameters:
+  _param:
+    gerrit_try_login: true
   gerrit:
     client:
       enabled: True
+      try_login: ${_param:gerrit_try_login}
       source:
         engine: pip
       dir: