Use a single class to create 'neutron' database

Use a class instead of multiplying 'neutron' database definitions.
The class 'system.galera.server.database.neutron' will be included
only once for a node that avoids database definitions dublication.

Change-Id: Ibf318200a7cf83fe3bd00c3ca265ed3bcb989811
Closes-Bug: https://mirantis.jira.com/browse/PROD-15066
diff --git a/neutron/control/opencontrail/single.yml b/neutron/control/opencontrail/single.yml
index 0c2841b..4bbd8f8 100644
--- a/neutron/control/opencontrail/single.yml
+++ b/neutron/control/opencontrail/single.yml
@@ -1,20 +1,7 @@
 classes:
 - service.neutron.control.single
+- system.galera.server.database.neutron
 parameters:
-  mysql:
-    server:
-      database:
-        neutron:
-          encoding: utf8
-          users:
-          - name: neutron
-            password: ${_param:mysql_neutron_password}
-            host: '%'
-            rights: all
-          - name: neutron
-            password: ${_param:mysql_neutron_password}
-            host: ${_param:cluster_local_address}
-            rights: all
   neutron:
     server:
       dns_domain: ${_param:cluster_domain}