Retrieve task statuses from ECS API

    Returns list of {RUNNING|PENDING|STOPPED} for each id in task_ids

def _get_task_statuses(task_ids, cluster):
    """
    Retrieve task statuses from ECS API

    Returns list of {RUNNING|PENDING|STOPPED} for each id in task_ids
    """
    response = client.describe_tasks(tasks=task_ids, cluster=cluster)

    # Error checking
    if response['failures'] != []:
        raise Exception('There were some failures:\n{0}'.format(
            response['failures']))
    status_code = response['ResponseMetadata']['HTTPStatusCode']
    if status_code != 200:
        msg = 'Task status request received status code {0}:\n{1}'
        raise Exception(msg.format(status_code, response))

    return [t['lastStatus'] for t in response['tasks']]