Collapse comment beloging to user.

def collapse(self, id_user):
        """Collapse comment beloging to user."""
        c = CmtCOLLAPSED(id_bibrec=self.id_bibrec, id_cmtRECORDCOMMENT=self.id,
                         id_user=id_user)
        db.session.add(c)
        db.session.commit()