def add_port_profile(self, profile_name, vlan_id, device_id):
        """Adds a port profile and its vlan_id to the table."""
        if not self.get_port_profile_for_vlan(vlan_id, device_id):
            port_profile = ucsm_model.PortProfile(profile_id=profile_name,
                                                  vlan_id=vlan_id,
                                                  device_id=device_id,
                                                  created_on_ucs=False)
            with self.session.begin(subtransactions=True):
                self.session.add(port_profile)
            return port_profile
Adds a port profile and its vlan_id to the table.