scenario_test: remove code to get the latest exabgp
scenario_test: remove code to get the latest exabgp

ramrunner/gobgp,fujita/gobgp,h-naoto/gobgp,h-naoto/gobgp,j-kato/gobgp,a16/gobgp,Dipsingh/gobgp,fujita/gobgp,postfix/gobgp,fujita/gobgp,fujita/gobgp,osrg/gobgp,tamihiro/gobgp,YujiOshima/gobgp,osrg/gobgp,j-kato/gobgp,YujiOshima/gobgp,j-kato/gobgp,a16/gobgp,osrg/gobgp,a16/gobgp,ishidawataru/gobgp,a16/gobgp,YujiOshima/gobgp,ishidawataru/gobgp,a16/gobgp,Dipsingh/gobgp,ishidawataru/gobgp,postfix/gobgp,tamihiro/gobgp,ramrunner/gobgp,a16/gobgp,ramrunner/gobgp,tamihiro/gobgp,osrg/gobgp,h-naoto/gobgp,a16/gobgp,Dipsingh/gobgp,tamihiro/gobgp,postfix/gobgp