config: fix Peer Group AddPath Config
config: fix Peer Group AddPath Config

Peer Group AddPath Config is deprecated but still needs to work.

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@gmail.com>

osrg/gobgp,a16/gobgp,a16/gobgp,a16/gobgp,a16/gobgp,osrg/gobgp,j-kato/gobgp,j-kato/gobgp,a16/gobgp,a16/gobgp,osrg/gobgp,a16/gobgp,fujita/gobgp,fujita/gobgp,j-kato/gobgp,fujita/gobgp,fujita/gobgp,osrg/gobgp