SOL002 VNF Lifecycle 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 LCM Interface.

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

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

Review period elapsed: approved**

SOL002/VNFLifecycleManagement-API/environment/variables.txt

@@ -13,10 +13,12 @@ ${ACCEPT}         application/json
 ${ACCEPT_JSON}         application/json
 ${apiRoot}        /
 ${apiName}        vnflcm
-${apiMajorVersion}    v1
+${apiMajorVersion}    v2
 ${AUTH_USAGE}     1
 ${WRONG_AUTHORIZATION}    Bearer    XXXXXWRONGXXXXX
 ${vnfInstanceId}       6fc3539c-e602-4afa-8e13-962fb5a7d81f
+${vnfInstanceId_NoSnapshotTask}    vnfInstanceIdForWhichSnapshotResourceDoesNotExist
+${vnfInstanceId_NOT_INSTANTIATED}    vnfResourceIsInNOT_INSTANTIATEDstate
 ${badVnfInstanceId}       wrongId
 ${instantiatedVnfInstanceId}    6fc3539c-e602-4afa-8e13-962fb5a7d81f    #Change with an instantiated vnfInstanceID
 ${conflicVnfInstanceId}    6fc3539c-e602-4afa-8e13-962fb5a7d81f
@@ -43,6 +45,9 @@ ${notInstantiatedVnfInstanceId}    NOT_INSTANTIATED_VNF_INSTANCE_ID
 ${NOT_EXISTANT_VNF_INSTANCE_ID}    NOT_EXISTANT_VNF_INSTANCE_ID    
 ${SYNC_MODE}    0
 
+${vnfSnapshotInfoId}
+${invalidVnfSnapshotInfoId}
+
 ${callback_uri}    http://localhost
 ${callback_port}    9091
 ${callback_endpoint}    /endpoint
@@ -64,6 +69,7 @@ ${fields}
 ${original_etag}    some_etag
 
 ${vnfdId}    6fc3539c-e602-4afa-8e13-962fb5a7d81f
+${invalidVnfdId}    vnfdId-in-DISABLED-state-or-DNE
 ${flavourId}    vnf flavour
 
 ${scaleVnfRequesttype}    SCALE_OUT