patch for get_data, for when there are 0 rows to fetch and has_more tag is still present

[lag21392]

def get_data(self, endpoint, max_recs=None, offset=0):
    """
    get data from a given endpoint
    this simplifies the looping process that would otherwise be repeated

    :param str endpoint: endpoint to be appended to bulk_base
    :param int max_recs: Max number of records to return
    """

    url_base = self.bulk_base + endpoint + '?limit={limit}&offset={offset}'

    limit, has_more = self._set_limit(max_recs, 0, True)

    return_data = []
    cant_rows = 1
    while has_more and cant_rows>0:

        url = url_base.format(limit=limit, offset=offset)
        
        req = requests.get(url=url, auth=self.auth)

        _elq_error_(req)

        if 'items' in req.json().keys():
            return_data.extend(req.json()['items'])
            cant_rows=len(req.json()['items'])
        else:
            cant_rows = 0
        offset += 1000

        if max_recs is None:

            has_more = req.json()['hasMore']

        limit, has_more = self._set_limit(max_recs, len(return_data),
                                          req.json()['hasMore'])

    return return_data