Get cached mine data for the targeted minions.

def get_cached_mine_data(self):
        '''
        Get cached mine data for the targeted minions.
        '''
        mine_data = {}
        minion_ids = self._tgt_to_list()
        log.debug('Getting cached mine data for: %s', minion_ids)
        mine_data = self._get_cached_mine_data(*minion_ids)
        return mine_data