bgp: enable nexthop_self for locally generated routes
bgp: enable nexthop_self for locally generated routes

Signed-off-by: ISHIDA Wataru <15703620d0b11e835ab4f34ebf88f2f40cce783e@lab.ntt.co.jp>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

osrg/ryu,zangree/ryu,fkakuma/ryu,lagopus/ryu-lagopus-ext,lagopus/ryu-lagopus-ext,zangree/ryu,fkakuma/ryu,habibiefaried/ryu,alanquillin/ryu,shinpeimuraoka/ryu,habibiefaried/ryu,pichuang/ryu,OpenState-SDN/ryu,alanquillin/ryu,StephenKing/ryu,Tejas-Subramanya/RYU_MEC,gareging/SDN_Framework,hisaharu/ryu,ttsubo/ryu,OpenState-SDN/ryu,zangree/ryu,ttsubo/ryu,Zouyiran/ryu,fkakuma/ryu,iwaseyusuke/ryu,zangree/ryu,pichuang/ryu,ttsubo/ryu,Zouyiran/ryu,TakeshiTseng/ryu,iwaseyusuke/ryu,hisaharu/ryu,lagopus/ryu-lagopus-ext,hisaharu/ryu,gareging/SDN_Framework,Zouyiran/ryu,iwaseyusuke/ryu,shinpeimuraoka/ryu,alanquillin/ryu,StephenKing/ryu,lagopus/ryu-lagopus-ext,OpenState-SDN/ryu,gareging/SDN_Framework,fujita/ryu,pichuang/ryu,habibiefaried/ryu,fujita/ryu,habibiefaried/ryu,takahashiminoru/ryu,StephenKing/ryu,takahashiminoru/ryu,fujita/ryu,Zouyiran/ryu,hisaharu/ryu,fujita/ryu,Tejas-Subramanya/RYU_MEC,takahashiminoru/ryu,alanquillin/ryu,osrg/ryu,takahashiminoru/ryu,zangree/ryu,pichuang/ryu,alanquillin/ryu,shinpeimuraoka/ryu,gareging/SDN_Framework,fujita/ryu,ttsubo/ryu,ttsubo/ryu,osrg/ryu,OpenState-SDN/ryu,OpenState-SDN/ryu,iwaseyusuke/ryu,osrg/ryu,TakeshiTseng/ryu,StephenKing/ryu,habibiefaried/ryu,pichuang/ryu,osrg/ryu,Tejas-Subramanya/RYU_MEC,hisaharu/ryu,shinpeimuraoka/ryu,TakeshiTseng/ryu,shinpeimuraoka/ryu,StephenKing/ryu,Zouyiran/ryu,Tejas-Subramanya/RYU_MEC,lagopus/ryu-lagopus-ext,TakeshiTseng/ryu,iwaseyusuke/ryu,gareging/SDN_Framework,TakeshiTseng/ryu,fkakuma/ryu,takahashiminoru/ryu,fkakuma/ryu,Tejas-Subramanya/RYU_MEC