[virsh] cleanup serial-files (consoles) of VM properly
[virsh] cleanup serial-files (consoles) of VM properly

The path has changed from 'sfiles' some time
ago and we currently the files are not cleaned.

Change-Id: I38af41f450d3206dc14f80628ff337862e383fca

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared