'Adds servers to monitoring policy
:param policy_id: Id of the monitoring policy
:rtype: ``str``
:param servers: List of server ID
:rtype: ``list`` of ``str``
:return: Instance of a monitoring policy
:rtype: ``dict``'

def ex_add_servers_to_monitoring_policy(self, policy_id, servers):

    body = {'servers': servers}
    response = self.connection.request(action=('monitoring_policies/%s/servers' % policy_id), data=body, method='POST')
    return response.object
