VDSM reports invalid failed multipath paths

Issue

• VDSM reports invalid failed multipath devices in the vdsm logs, e.g.;

-  vdsm;

{u'3600507680c800462e8000000000014df': {'valid_paths': 4, 'failed_paths': [u'sdy']},


-  multipath;

3600507680c800462e8000000000014df dm-22 IBM     ,2145            
size=3.0T features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 16:0:1:5 sdw  65:96  active ready running
| `- 18:0:0:5 sdz  65:144 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 16:0:2:5 sdx  65:112 active ready running
  `- 18:0:3:5 sdn  8:208  active ready running