Adding keystone os_client_config to keystone nodes

The patch adds keystone:client:os_client:config pillar to create
cloud.yml file on control nodes. The file is required to use new
salt-formula modules like cinderv3 etc.

In addition: the file is going to replace deprecated keystonerc file.

Change-Id: Ibc1c511bde23298318c81682e685f677f30f1a1d
Related-PROD: PROD-24543 (PROD:24543)
2 files changed