SOL005 NSD 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 SOL005 NSD Management Interface.

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

Deadline for review: Thursday 18th March 2021 @6pm CET

Review period elapsed: Approved !!

SOL005/NSDManagement-API/environment/variables.txt

@@ -9,7 +9,7 @@ ${ACCEPT_JSON}    application/json
 ${apiRoot}        /
 ${AUTH_USAGE}     1
 ${NEG_AUTHORIZATION_TOKEN}    Bearer negativetoken
-${apiMajorVersion}     v1
+${apiMajorVersion}     v2
 ${apiName}        nsd
 ${FIELD_USAGE}    1
 ${NFVO_AUTHENTICATION}    Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9