Avoid swaping back in test_volume_swap
starting with Epoxy/libvirt 10, for iSCSI devices
the second swap breaks with
```
Volume rebase failed: Requested operation is not valid:
Setting different DAC user or group on /dev/sda which is already in use
```
The swap back is very much synthetic anyway, IRL this api is
not meant for user interactions and is mainly used by cinder's
non-driver assisted volume migration, which never does that swap back.
Related-Issue: PRODX-52879
Change-Id: I4871da31441d9bb7c5da62cb25aca897839d68cf
1 file changed