server_test: Enhance test cases for MonitorRib API
server_test: Enhance test cases for MonitorRib API

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

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