SOL005 VNF Snapshot Package - 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 VNF Snapshot Package Interface.

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

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

Review period elapsed: Approved !!

SOL005/VNFSnapshotPackageManagement-API/environment/variables.txt

@@ -96,5 +96,9 @@ ${callbackResp}    localhost
 ${vnfSnapshotPkgId}
 ${invalidVnfSnapshotPkgId}
 ${vnfSnapshotPkgId_notInAvailableState}
+${vnfSnapshotInfoId}
+${vnfInstanceId}    associated-with-extraction-of-VNF-snapshot-package
+${invalidVnfInstanceId}    invlalid-association-with-VNF-snapshot-package
 
-${erroneousState_VnfSnapshotPackage}    1
+${vnfPackageContent_URI}    http://uri/for/vnfpackagecontent/upload
+${externalArtifact_URI}    http://uri/for/external/artifact
\ No newline at end of file