Issue a GET request to IASystem with the given url
    and return a response in Collection+json format.
    :returns: http response with content in json

def get_resource(url, subdomain):
    """
    Issue a GET request to IASystem with the given url
    and return a response in Collection+json format.
    :returns: http response with content in json
    """
    headers = {"Accept": "application/vnd.collection+json"}
    response = IASYSTEM_DAO().getURL(url, headers, subdomain)

    logger.info("%s ==status==> %s" % (url, response.status))

    if response.status != 200:
        logger.error("%s ==data==> %s" % (url, response.data))
        raise DataFailureException(url, response.status, response.data)

    return json.loads(response.data)