'Mount the Quobyte volume.
Used for example by RemoteFsDriver._update_volume_stats'

@utils.synchronized('quobyte_ensure', external=False)
def _ensure_shares_mounted(self):

    self._mounted_shares = []
    self._load_shares_config()
    for share in self.shares.keys():
        try:
            self._ensure_share_mounted(share)
            self._mounted_shares.append(share)
        except Exception as exc:
            LOG.warning('Exception    during    mounting    %s', exc)
    LOG.debug('Available    shares    %s', self._mounted_shares)
