'Will return if this is a valid PowerVM key.
:param key: The powervm key.
:return: True if valid key.  False if non-powervm key and should be
skipped.'

def _is_pvm_valid_key(self, key):

    if (not key.startswith('powervm:')):
        return False
    if (key not in self._ATTRS_MAP):
        LOG.warning("Unhandled    PowerVM    key    '%s'.", key)
        return False
    return True
