policy: add 4byte AS test
policy: add 4byte AS test

Signed-off-by: Hiroshi Yokoi <e59dd578f413d3787f7f28c9bb6236efb1779349@po.ntts.co.jp>

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