test/lib/exabgp: Enable to get adj-RIB-{in,out}
test/lib/exabgp: Enable to get adj-RIB-{in,out}

"exabgpcli" supports to show adj-RIB-in and adj-RIB-out, this patch
enables ExaBGPContainer to get these RIBs information.

Signed-off-by: IWASE Yusuke <bb80e84cc9f5a8f01385872ee89032beb5d4eba7@gmail.com>

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