SOL003 VNF Lifecycle Operation Granting - 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 Lifecycle Operation Granting Interface.

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

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

Review period elapsed: approved !

added MR ready to review label

changed the description

added MR ready to be merged label and removed MR ready to review label

added 33 commits

• 31162e2c...e11ef6aa - 29 commits from branch 3.3.1-dev
• 71e8187a - updated versions and minor bug fixes
• 1fd70a0f - bug fix: added missing keyword
• ce812e94 - updated jsons, schemas and importing of variables for descriptors
• ab31b3da - updated refs

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merged

mentioned in commit c0d6d76d