SOL002 VNF LCM Coordination - Implementation of Robot tests

This merge request refers to the implementation of Robot tests of SOL002 VNF LCM Coordination Interface.

@lynchpi @aelken @matsuurat @sayama @kraja @zafar @muhammadh @abbasim

Deadline for review: Friday 5th November 2021 @6pm CET

Review period elapsed: Approved !