Ceph

The scenario is to create 2 rgw instances on the same node (different ports) under the same realm and same zone.
Currently the approach to do it fails as changing the port with the same service_id fails to launch a new RGW insatnce, and changing the service_id create a new RGW realm altogether.

The new approach discussed is , to decouple the service_id from the realm name , and use the rgw_realm parameter to determine the realm name.

Version-Release number of selected component (if applicable):
ceph version 16.0.0-7953.el8cp (aac7c5c7d5f82d2973c366730f65255afd66e515) pacific (dev)

Steps to Reproduce:
1. Create a spec file with service_id and rgw_realm and rgw_zone, and create orch apply this spec.
2. Create a new spec file with the same service_id , and different port for RGW. This fails to launch the rgw instance , and the service_id is the same.
3. Change the service_id in the spec file , and a new realm is created, which defeats our original purpose altogether.