- Fix Test ID headers (missing : and or space)
- Change 'clause' to 'Clause'
- Ensure references include 'ETSI GS'
- Fix index files for SOL002 and SOL003

SOL005 VNF Package Management - Implementation of deltas between v2.6.1 and v2.4.1

See merge request nfv/api-tests!105

SOL005 NS Performance Management - Implementation of deltas between v2.6.1 and v2.4.1

See merge request nfv/api-tests!104

SOL005 NS Lifecycle Management - Implementation of deltas between v2.6.1 and v2.4.1

See merge request nfv/api-tests!103

Merge branch '2.6.1-dev-SOL005-NSLifecycleManagement-API' of https://forge.etsi.org/rep/stf/stf-583/api-tests into 2.6.1-dev-SOL005-NSLifecycleManagement-API

SOL005 NS Fault Management - Implementation of deltas between v2.6.1 and v2.4.1

See merge request !102

# Conflicts:
#   SOL005/NSFaultManagement-API/Alarms.robot
#   SOL005/NSFaultManagement-API/Subscriptions.robot

SOL005 NSD Management - Implementation of deltas between v2.6.1 and v2.4.1

See merge request !101

# Conflicts:
#   SOL005/NSDManagement-API/PNFDContent.robot