bgp: use host's ssh host key if not specified
bgp: use host's ssh host key if not specified

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

pichuang/ryu,Zouyiran/ryu,diogommartins/ryu,torufuru/oolhackathon,alanquillin/ryu,gopchandani/ryu,jazzmes/ryu,ttsubo/ryu,hisaharu/ryu,yamt/ryu,John-Lin/ryu,zyq001/ryu,lsqtongxin/ryu,sivaramakrishnansr/ryu,gopchandani/ryu,ttsubo/ryu,alyosha1879/ryu,jalilm/ryu,StephenKing/summerschool-2015-ryu,sivaramakrishnansr/ryu,StephenKing/summerschool-2015-ryu,habibiefaried/ryu,Zouyiran/ryu,umkcdcrg01/ryu_openflow,lagopus/ryu-lagopus-ext,fujita/ryu,takahashiminoru/ryu,shinpeimuraoka/ryu,fkakuma/ryu,openvapour/ryu,StephenKing/ryu,lsqtongxin/ryu,ttsubo/ryu,alanquillin/ryu,OpenState-SDN/ryu,elahejalalpour/ELRyu,yamt/ryu,StephenKing/ryu,jkoelker/ryu,umkcdcrg01/ryu_openflow,elahejalalpour/ELRyu,darjus-amzn/ryu,alanquillin/ryu,ysywh/ryu,zangree/ryu,StephenKing/ryu,lsqtongxin/ryu,lagopus/ryu-lagopus-ext,Tejas-Subramanya/RYU_MEC,openvapour/ryu,fujita/ryu,pichuang/ryu,jalilm/ryu,iwaseyusuke/ryu,gareging/SDN_Framework,iwaseyusuke/ryu,habibiefaried/ryu,shinpeimuraoka/ryu,darjus-amzn/ryu,fujita/ryu,John-Lin/ryu,iwaseyusuke/ryu,zyq001/ryu,haniehrajabi/ryu,Zouyiran/ryu,jalilm/ryu,fkakuma/ryu,ttsubo/ryu,OpenState-SDN/ryu,ynkjm/ryu,ysywh/ryu,ysywh/ryu,pichuang/ryu,John-Lin/ryu,hisaharu/ryu,sivaramakrishnansr/ryu,shinpeimuraoka/ryu,evanscottgray/ryu,umkcdcrg01/ryu_openflow,StephenKing/ryu,openvapour/ryu,haniehrajabi/ryu,zangree/ryu,lsqtongxin/ryu,zangree/ryu,alyosha1879/ryu,elahejalalpour/ELRyu,lagopus/ryu-lagopus-ext,habibiefaried/ryu,ysywh/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,gareging/SDN_Framework,gareging/SDN_Framework,John-Lin/ryu,ynkjm/ryu,Tejas-Subramanya/RYU_MEC,openvapour/ryu,Tesi-Luca-Davide/ryu,darjus-amzn/ryu,muzixing/ryu,jazzmes/ryu,Tesi-Luca-Davide/ryu,gopchandani/ryu,yamt/ryu,zyq001/ryu,zangree/ryu,OpenState-SDN/ryu,Tejas-Subramanya/RYU_MEC,John-Lin/ryu,haniehrajabi/ryu,alyosha1879/ryu,Tesi-Luca-Davide/ryu,hisaharu/ryu,TakeshiTseng/ryu,fujita/ryu,osrg/ryu,torufuru/oolhackathon,TakeshiTseng/ryu,lzppp/mylearning,jazzmes/ryu,jkoelker/ryu,fkakuma/ryu,fkakuma/ryu,openvapour/ryu,lzppp/mylearning,diogommartins/ryu,Zouyiran/ryu,diogommartins/ryu,yamt/ryu,habibiefaried/ryu,lzppp/mylearning,ynkjm/ryu,jalilm/ryu,zyq001/ryu,muzixing/ryu,evanscottgray/ryu,zangree/ryu,pichuang/ryu,Zouyiran/ryu,lsqtongxin/ryu,Tejas-Subramanya/RYU_MEC,lzppp/mylearning,ynkjm/ryu,haniehrajabi/ryu,yamt/ryu,diogommartins/ryu,StephenKing/summerschool-2015-ryu,elahejalalpour/ELRyu,ynkjm/ryu,gareging/SDN_Framework,StephenKing/ryu,hisaharu/ryu,zyq001/ryu,lagopus/ryu-lagopus-ext,TakeshiTseng/ryu,takahashiminoru/ryu,iwaseyusuke/ryu,lzppp/mylearning,umkcdcrg01/ryu_openflow,darjus-amzn/ryu,osrg/ryu,gopchandani/ryu,iwaseyusuke/ryu,muzixing/ryu,OpenState-SDN/ryu,muzixing/ryu,OpenState-SDN/ryu,alyosha1879/ryu,lagopus/ryu-lagopus-ext,osrg/ryu,Tesi-Luca-Davide/ryu,gareging/SDN_Framework,castroflavio/ryu,TakeshiTseng/ryu,elahejalalpour/ELRyu,castroflavio/ryu,takahashiminoru/ryu,haniehrajabi/ryu,alanquillin/ryu,Tejas-Subramanya/RYU_MEC,StephenKing/summerschool-2015-ryu,castroflavio/ryu,muzixing/ryu,evanscottgray/ryu,pichuang/ryu,osrg/ryu,torufuru/oolhackathon,fkakuma/ryu,sivaramakrishnansr/ryu,ysywh/ryu,alanquillin/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,Tesi-Luca-Davide/ryu,TakeshiTseng/ryu,gopchandani/ryu,habibiefaried/ryu,sivaramakrishnansr/ryu,darjus-amzn/ryu,ttsubo/ryu,umkcdcrg01/ryu_openflow,osrg/ryu,fujita/ryu,jalilm/ryu,diogommartins/ryu,hisaharu/ryu,StephenKing/summerschool-2015-ryu,jkoelker/ryu