Define local gerrit replication and cronjob only once

We are moving this functionality to puppet module, so in
order to avoid errors, define only these settings here if
needed.

Change-Id: Ie21642c75ec5f3ccd21528c094ff4d34970e5564

modules/openstack_project/manifests/gerrit.pp

@@ -399,6 +399,7 @@ class openstack_project::gerrit (
 
   if ($projects_file != 'UNDEF') {
     if ($replicate_local) {
+      if (!defined(File[$local_git_dir])) {
         file { $local_git_dir:
           ensure  => directory,
           owner   => 'gerrit2',
@@ -413,6 +414,7 @@ class openstack_project::gerrit (
           environment => 'PATH=/usr/bin:/bin:/usr/sbin:/sbin',
         }
       }
+    }
 
     file { '/home/gerrit2/projects.yaml':
       ensure  => present,