Generate random keystone users

Change-Id: I8dbd07b10d29b43d1c35fa76bcaa0f0efb32beda
Related-Prod: PROD-29868
diff --git a/barbican/server/cluster.yml b/barbican/server/cluster.yml
index 7b98c83..110ff29 100644
--- a/barbican/server/cluster.yml
+++ b/barbican/server/cluster.yml
@@ -8,8 +8,12 @@
     server:
       role: ${_param:openstack_node_role}
       identity:
+        user: ${_param:keystone_barbican_username}
+        password: ${_param:keystone_barbican_password}
         protocol: ${_param:cluster_internal_protocol}
       database:
+        user: ${_param:mysql_barbican_username}
+        password: ${_param:mysql_barbican_password}
         host: ${_param:openstack_database_address}
         x509:
           enabled: ${_param:openstack_mysql_x509_enabled}