Wrong system disk quota after onevm snapshot-create on done VM

[paczerny]

Description
onevm snapshot-create on VM in DONE state (owned by not oneadmin) returns error (wrong state) but the system_disk_quota is counted for the VM owner.

To Reproduce
As userA:

• create template
• instantiate it
• make sure the VM is owned by userA
• terminate the VM
• call onevm snapshot-create
• check user quotas, the system disk quota should be 0

Expected behavior
Correctly count system disk quotas

Details

• Affected Component: Quotas
• Hypervisor: --
• Version: 6.4 and master

Additional context
Double check quotas also for other errors returned by onevm snapshot-create. Review also onevm snapshot-delete operation.

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)