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
21 files changed