Add test scenarios for application support Subscriptions; change...

See merge request mec/AdvantEDGE!18

# Conflicts:
#   tools/HOWTO

Stf678 task1 2 mec030

See merge request mec/AdvantEDGE!17

Merge branch 'bugfix/STF678_Task1_2_MEC013_TTCN-3_Validation' of https://forge.etsi.org/rep/mec/AdvantEDGE into bugfix/STF678_Task1_2_MEC013_TTCN-3_Validation

Update the logic to handle the PUT request for zoneLocationEventSubscription and zoneStatusSuscription without array in request body

Update the logic to handle the post request for zoneLocationEventSubscription and zoneStatusSubscription without array in request body

Update the logic to handle the PUT request for userLocationEvenSubscription and userLocationPeriodicSubscription without array in request body

Update the Logic to handle the post request for userLocationEventSubscription and userLocationPeriodicsubscription without array