SOL002 VNF Performance Management - Implementation of deltas between v3.3.1 and v2.7.1

This merge request refers to the implementation of deltas between v3.3.1 and v2.7.1 of SOL002 VNF Performance Management Interface.

@lynchpi @aelken @matsuurat @carignani @sayama @kraja @zulfiqar @zafar

**Deadline for review: Wednesday 3rd March 2021 @6pm CET

Review period elapsed: approved**

SOL002/VNFPerformanceManagement-API/jsons/PerformanceInformationAvaliableNotification.json

@@ -2,6 +2,7 @@
 	"id":"",
 	"notificationType":"PerformanceInformationAvailableNotification",
 	"timeStamp":"",
+	"pmJobId":"",
 	"objectType":"",
 	"objectInstanceId":"{objectInstanceId}",
 	"_links":{{