Re-installs paths from NC with current BGP policy.

        Iterates over known paths from NC installed in `vrf4_table` and
        adds new path with path attributes as per current VRF configuration.

def re_install_net_ctrl_paths(self, vrf_table):
        """Re-installs paths from NC with current BGP policy.

        Iterates over known paths from NC installed in `vrf4_table` and
        adds new path with path attributes as per current VRF configuration.
        """
        assert vrf_table
        for dest in vrf_table.values():
            for path in dest.known_path_list:
                if path.source is None:
                    vrf_table.insert_vrf_path(
                        nlri=path.nlri,
                        next_hop=path.nexthop,
                        gen_lbl=True
                    )
        LOG.debug('Re-installed NC paths with current policy for table %s.',
                  vrf_table)