NCMP to client schema for Subscription

- added schema to comply with the agreed upon changes and it include
  capability to have statusCode and statusMessage as well.
- Renamed existing schemas just for consistency

Issue-ID: CPS-1739
Change-Id: I6bb1d13bf5c84ca812c5cf37062a168845d6be1d
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
3 files changed