Merge 2.7.1 dev into Master, for TST010ed271 publication

Closes #174, #166, #167, #162, #165, #161, #159, #158, #156, #155, #154, #98, #94, #151, #148, #145, #135, #89, #83, #77, #71, #73, #44, and #20

See merge request nfv/api-tests!193

SOL002/3/5 Fixes for Test IDs in v2.7.1

See merge request !175

SOL002/3/5 Notification Endpoint tests: fix of Config ID in v2.7.1

See merge request !171

SOL003 Virtualised Resource Quota - Implementation of missing notification test in v2.7.1

See merge request !170

NFV&MEC API Plugtests 2021: changes to fix issues found on SOL002/3/5 v2.7.1 tests

See merge request !154