Fix gerrit mysql permissions

This change will fix errors during database initializing by gerrit
The same grants are used in upstream manifests:
https://github.com/openstack-infra/puppet-gerrit/blob/master/manifests/mysql.pp

Change-Id: Ibb25fcc61f3030b0b9327a9d498d41bdd700abe4

murano-apps/Gerrit/Resources/scripts/database.pp

@@ -8,6 +8,6 @@ node default {
     user     => hiera('gerrit_db_user'),
     password => hiera('gerrit_db_password'),
     host     => 'localhost',
-    grant    => ['SELECT', 'UPDATE', 'CREATE', 'INSERT'],
+    grant    => ['all'],
   }
 }