Comment to an issue.
        :param issue_id: the id of the comment
        :param body: the comment body
        :return:

def comment_issue(self, issue_id, body):
        """
        Comment to an issue.
        :param issue_id: the id of the comment
        :param body: the comment body
        :return:
        """
        request_url = "{}issue/{}/comment".format(self.create_basic_url(),
                                                  issue_id)

        payload = {'comment': body}

        return_value = self._call_api(request_url,
                                      method='POST', data=payload)

        LOG.debug(return_value)