SOL003 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 SOL003 VNF Snapshot Package Interface.

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

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

Review period elapsed: approved !

SOL003/VNFSnapshotPackageManagement-API/environment/variables.txt

@@ -77,7 +77,7 @@ ${artifactPath}    artifactPath
 ${CONTENT_TYPE_OCTET}    application/octet-stream
 ${NFVO_RANGE_OK}    1    # If 1 means that Range is supported by the NFVO
 ${range}          bytes=0-1023
-${full_size}        2000            # Size of the requested artifact to be downloaded via partial downloads
+${full_length}        2000            # Size of the requested artifact to be downloaded via partial downloads
 ${erroneousRange}    bytes=10000000-1000000000    # Requesting a out of range number of bytes
 ${vnfPackageOctetStreamId}    octetStreamPkgId
 ${vnfdOctetStreamId}    octetStreamVnfdId