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-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index 6cc6c14..b4b8d68 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -101,6 +101,7 @@
       rndc_host: 127.0.0.1
       rndc_port: 953
       rndc_key_file: /etc/designate/rndc.key
+    designate_worker_enabled: true
     linux_system_repo: deb [arch=amd64] http://mirror.fuel-infra.org/mcp-repos/${_param:openstack_version}/xenial ${_param:openstack_version} main
     openstack_public_neutron_subnet_gateway:  192.168.130.1
     openstack_public_neutron_subnet_cidr: 192.168.130.0/24
@@ -128,3 +129,6 @@
   horizon:
     server:
       secure: False
+  designate:
+    worker:
+      enabled: ${_param:designate_worker_enabled}