Find usage for services in each cluster.

        :param cluster_name: name of the cluster to find usage for
        :type cluster_name: str

def _find_usage_one_cluster(self, cluster_name):
        """
        Find usage for services in each cluster.

        :param cluster_name: name of the cluster to find usage for
        :type cluster_name: str
        """
        tps_lim = self.limits['EC2 Tasks per Service (desired count)']
        paginator = self.conn.get_paginator('list_services')
        for page in paginator.paginate(
            cluster=cluster_name, launchType='EC2'
        ):
            for svc_arn in page['serviceArns']:
                svc = self.conn.describe_services(
                    cluster=cluster_name, services=[svc_arn]
                )['services'][0]
                if svc['launchType'] != 'EC2':
                    continue
                tps_lim._add_current_usage(
                    svc['desiredCount'],
                    aws_type='AWS::ECS::Service',
                    resource_id='cluster=%s; service=%s' % (
                        cluster_name, svc['serviceName']
                    )
                )