SOL003 VNF Fault Management - Implementation of deltas between v3.6.1 and v3.5.1

This merge request refers to the implementation of deltas between v3.6.1 and v3.5.1 of SOL003 VNF Fault Management Interface.

@lynchpi @aelken @matsuurat @sayama @zafar @reinaortega @abbasim

Deadline for review: Monday 11th July 2022 @6pm CEST

SOL003/VNFFaultManagement-API/environment/variables.txt

@@ -16,7 +16,8 @@ ${invalid_alarm_filter}    badFilter
 ${alarmId}    6fc3539c-e602-4afa-8e13-962fb5a7d81d
 ${CONTENT_TYPE_PATCH}    application/merge-patch+json
 
-${Etag}=    an etag
+${Etag}    an etag
+${invalid_etag}    invalid etag
 
 
 ${VNFM_DUPLICATION}    1