Description of problem:
VM is not running on the source host after migration - as expected, although there is a try to set the threshold for the disk, plus this should not be logged as an error.

Version-Release number of selected component (if applicable):
Versions:
vdsm-4.40.70.6-1.el8ev.x86_64
ovirt-engine-4.4.7.6-0.11.el8ev
QEMU emulator version 5.2.0 (qemu-kvm-5.2.0-16.module+el8.4.0+11536+725e25d9.2)

How reproducible:
Need to make multiple extensions during the migration to hit the issue. 

Steps to Reproduce:
1. Create a VM with a thin disk - better to make the disk big enough (for the many tries until we hit the extension during migration).
2. Better to modify in all the hosts the VM is migrated to/from, and SPM host:
    vi /etc/vdsm/vdsm.conf.d/volume-utilization.conf I put these values and then restart vdsm.
    [irs]
    volume_utilization_percent = 50
    volume_utilization_chunk_mb = 128
    
    
3. Make the VM migration slow, so we can do multiple extends during 
   the migration.
   This can be done using stress tool, for example:
   dnf install stress
   stress --VM 1 --VM-bytes 128M
    
   This step is optional if the migration finishes too fast (I could reproduce it without it).

4.  Write data in the VM to trigger extension.
	for i in $(seq -w 11); do
	    echo "writing..."
	    dd if=/dev/zero bs=1M count=64 of=data.$i oflag=direct conv=fsync
	    echo "Waiting..."
	    sleep 6
	done
5. Start the script in the VM and right after start the migration	
	
	

Actual results:

2021-07-06 13:39:34,683+0300 ERROR (mailbox-hsm/3) [virt.vm] (vmId='e7ef44e5-42e1-440e-8426-d718ffbe5dba') Failed to set block threshold for drive 'sda' (/rhev/data-center/mnt/blockSD/aa73b4d0-a22d-4f65-b254-594b34f0e6a8/images/8735fa39-a148-43df-a78e-4f2e5ccdf688/0c3111fb-ef7e-49cf-9638-b3ca25afb983): Requested operation is not valid: domain is not running (drivemonitor:128)
2021-07-06 13:39:34,683+0300 ERROR (mailbox-hsm/3) [virt.vm] (vmId='e7ef44e5-42e1-440e-8426-d718ffbe5dba') cannot cont while Down (vm:1709)


2021-07-08 17:19:52,589+0300 ERROR (mailbox-hsm/1) [virt.vm] (vmId='2eb53807-6c20-4976-9a8b-31531b5fdef1') Failed to set block threshold for drive 'sda' (/rhev/data-center/mnt/blockSD/aa73b4d0-a22d-4f65-b254-594b34f0e6a8/images/10883a68-06ec-460b-a115-d23260482fa9/6f350411-34ce-4b13-8214-17aa0ea829b9): Domain not found: no domain with matching uuid '2eb53807-6c20-4976-9a8b-31531b5fdef1' (New_VM1) (drivemonitor:128)
2021-07-08 17:19:52,590+0300 ERROR (mailbox-hsm/1) [virt.vm] (vmId='2eb53807-6c20-4976-9a8b-31531b5fdef1') cannot cont while Down (vm:1709)


Expected results:

This is an expected condition, so shouldn't be logged as an ERROR.