Add designate worker role as default for deployments

This change is a preparational step before changes proposed in
CR [1] will be merged.

Changes to virtual-mcp-ocata-dvr model are not proposed here
due to parallel change to it:
https://gerrit.mcp.mirantis.net/6723

[1] https://gerrit.mcp.mirantis.net/10030

Change-Id: I38e4e919c53753cbb575facf0c7333a9da89c44b
Related-CR: https://gerrit.mcp.mirantis.net/10030
Related-PROD: https://mirantis.jira.com/browse/PROD-14396
diff --git a/classes/cluster/virtual-mcp-ocata-ovs/openstack/control.yml b/classes/cluster/virtual-mcp-ocata-ovs/openstack/control.yml
index cc036af..f992861 100644
--- a/classes/cluster/virtual-mcp-ocata-ovs/openstack/control.yml
+++ b/classes/cluster/virtual-mcp-ocata-ovs/openstack/control.yml
@@ -110,6 +110,8 @@
                 rndc_host: ${_param:openstack_control_node03_address}
                 rndc_port: 953
                 rndc_key_file: /etc/designate/rndc.key
+    worker:
+      enabled: ${_param:designate_worker_enabled}
   glance:
     server:
       storage: