'rollback last'

def rollback_last(self):

    cfg_xml = ''
    self.updates_cmd.append(('rollback    configuration    to    last    %s' % self.last))
    cfg_xml = (CE_NC_ACTION_ROLLBACK_LAST % self.last)
    recv_xml = execute_nc_action(self.module, cfg_xml)
    self.check_response(recv_xml, 'ROLLBACK_LAST')
    self.changed = True
