Description of problem:
When trying to warm migrate a VMware VM with CBT disabled - though the migration plan fails on "Changed Block Tracking (CBT) is disabled for VM id:<vm-id> name:'<vm-name>'" - one snapshot is taken on the source VM.
The snapshot does not get deleted once the migration plan fails.

Tested with VMware6.5 and VMware7.0

Version-Release number of selected component (if applicable):
MTV-2.3.2-9 / iib:268781
CNV-4.10.3-19

How reproducible:
100%

Original bug: https://bugzilla.redhat.com/show_bug.cgi?id=2106597