'pcs resource create' command fails with python traces

Issue

• When adding a resource with pcs resource create command we are getting error messages:

  $ pcs resource create zimbra_service zimbra ocf:heartbeat:zimbra  --group zimbragroup
  [...]
  File "/usr/sbin/pcs", line 135, in <module>
  main(sys.argv[1:])
  File "/usr/sbin/pcs", line 114, in main
  resource.resource_cmd(argv)
  File "/usr/lib/python2.7/site-packages/pcs/resource.py", line 71, in resource_cmd
  resource_create(res_id, res_type, ra_values, op_values, meta_values, clone_opts)
  File "/usr/lib/python2.7/site-packages/pcs/resource.py", line 328, in resource_create
  default_op_values = utils.get_default_op_values(ra_type)
  File "/usr/lib/python2.7/site-packages/pcs/utils.py", line 695, in get_default_op_values
  root = ET.fromstring(metadata)
  File "/usr/lib64/python2.7/xml/etree/ElementTree.py", line 1300, in XML
  parser.feed(text)
  File "/usr/lib64/python2.7/xml/etree/ElementTree.py", line 1642, in feed
  self._raiseerror(v)
  File "/usr/lib64/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
  raise errxml.etree.ElementTree.ParseError: not well-formed (invalid token): line 1, column 17