rhevm-upgrade failure due to missing yum groups.

Issue

• rhevm-upgrade failure due to missing yum groups.

2013-06-12 07:59:33::ERROR::rhevm-upgrade::1366::root:: Traceback (most recent call last):
  File "/usr/bin/rhevm-upgrade", line 1359, in <module>
    main(options)
  File "/usr/bin/rhevm-upgrade", line 1190, in main
    runFunc([rhyum.begin], MSG_INFO_CHECK_UPDATE)
  File "/usr/bin/rhevm-upgrade", line 622, in runFunc
    func()
  File "/usr/bin/rhevm-upgrade", line 305, in begin
    for group in self._miniyum.queryGroups():
  File "/usr/share/ovirt-engine/scripts/miniyum.py", line 801, in queryGroups
    installed, available = self._yb.doGroupLists()
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 2803, in doGroupLists
    if self.comps.compscount == 0:
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 920, in <lambda>
    comps = property(fget=lambda self: self._getGroups(),
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 842, in _getGroups
    raise Errors.GroupsError, _('No Groups Available in any repository')
GroupsError: No Groups Available in any repository