Config data store listener for RSP creation

Config data store listener for RSP creation

- Previous RSP creation via RPC is deprecated, but still supported.
- Now its possible to create RSPs with a write to the SFP config.
- SFP config creation will trigger an RSP config creation, which
  triggers an RSP oper creation.
- Deleting or modifying SFs/SFFs now deletes the SFP, not the RSP
- Still pending: Unit tests

Change-Id: I9cf947abdac6433d0e7d961c372f43f0f6d572c8
Signed-off-by: Brady Johnson <[email protected]>
Signed-off-by: Jaime Caamaño Ruiz <[email protected]>