cli: update bash_completion for commands of policy
cli: update bash_completion for commands of policy

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