[RHEV] create storage domain fails with error code 351 (KeyError: 'getgrgid(): gid not found: 107')and luns disappear

Issue

• Tried to create  a storage domain by selecting a 'cluster' and datacenter', giving it a name and selecting LUNs. It almost immediately failed with an error and then the LUNs disappear.

• Below tracebacks appeared in vdsm logs:

22:35:45,438::task::868::TaskManager.Task::(_setError) Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 876, in _run
    return fn(*args, **kargs)
  File "/usr/share/vdsm/storage/hsm.py", line 1201, in public_createStorageDomain
    domClass=domClass, typeSpecificArg=typeSpecificArg, version=domVersion)
  File "/usr/share/vdsm/storage/sdf.py", line 60, in create
    version=version)
  File "/usr/share/vdsm/storage/blockSD.py", line 326, in create
    lvm.createLV(vgName, sd.METADATA, "%s" % (metasize))
  File "/usr/share/vdsm/storage/lvm.py", line 1013, in createLV
    gName = grp.getgrgid(st.st_gid).gr_name
KeyError: 'getgrgid(): gid not found: 107'