SOL003 Virtualised Resource Quota - 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 SOL003 VNF Virtualised Resource Quota Interface.

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

Deadline for review: Friday 12th March 2021 @6pm CET

Review period elapsed: approved !

SOL003/VirtualisedResourcesQuotaAvailableNotification-API/environment/variables.txt

@@ -15,11 +15,14 @@ ${sub_filter}    filter
 ${sub_filter_invalid}    filter_invalid
 
 ${callback_endpoint}    /notification
+${callback_endpoint_fwd}    /endpoint/check
 ${callback_subscribe}    /subscribe
 ${callback_port}    9091
 ${callback_uri}     http://localhost
 ${sleep_interval}    20s
 
+${notification_request}    []
+${notification_response}    []
 
 ${apiRoot}        /
 ${apiName}        vrqan