Adds a Issue and returns a :class:`Issue` resource.

        :param subject: subject of the :class:`Issue`
        :param priority: priority of the :class:`Issue`
        :param priority: status of the :class:`Issue`
        :param issue_type: type of the :class:`Issue`
        :param severity: severity of the :class:`Issue`
        :param attrs: other :class:`Issue` attributes

def add_issue(self, subject, priority, status,
                  issue_type, severity, **attrs):
        """
        Adds a Issue and returns a :class:`Issue` resource.

        :param subject: subject of the :class:`Issue`
        :param priority: priority of the :class:`Issue`
        :param priority: status of the :class:`Issue`
        :param issue_type: type of the :class:`Issue`
        :param severity: severity of the :class:`Issue`
        :param attrs: other :class:`Issue` attributes
        """
        return Issues(self.requester).create(
            self.id, subject, priority, status,
            issue_type, severity, **attrs
        )