Cm Subscriptions Docs

- Included documentation for an overview of Cm Data Subscription for the
  Create and Delete use case.
- Only included the json schemas for the events that are coming in and
  going out of NCMP.
- Not mentioning anything abt the internal events we use between DMIs.
- The docs can later be used to explain abt the notifications when they
  are implemented.

Issue-ID: CPS-2324
Change-Id: I2497656e0e56c93054b7e92b1742a668463c3ffc
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/cps-ncmp-events/src/main/resources/schemas/cmnotificationsubscription/ncmp-out-event-schema-1.0.0.json b/cps-ncmp-events/src/main/resources/schemas/cmnotificationsubscription/ncmp-out-event-schema-1.0.0.json
index 0c8d02a..d6ef55d 100644
--- a/cps-ncmp-events/src/main/resources/schemas/cmnotificationsubscription/ncmp-out-event-schema-1.0.0.json
+++ b/cps-ncmp-events/src/main/resources/schemas/cmnotificationsubscription/ncmp-out-event-schema-1.0.0.json
@@ -50,10 +50,10 @@
         }
       },
       "required": [
+        "subscriptionId",
         "acceptedTargets",
-        "pendingTargets",
         "rejectedTargets",
-        "subscriptionId"
+        "pendingTargets"
       ],
       "title": "Data"
     }