revert s/_/-/ changes for ryu.conf
revert s/_/-/ changes for ryu.conf

cfg.py automatically replaces '-' in option names to '_' for config files.
so s/_/-/ in this file was a mistake.  revert the commit.

Signed-off-by: YAMAMOTO Takashi <458bba2e4a8704776b33478100c98529b639cd9e@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

sivaramakrishnansr/ryu,fujita/ryu,elahejalalpour/ELRyu,ntts-clo/ryu,hisaharu/ryu,iwaseyusuke/ryu,fujita/ryu,fujita/ryu,takahashiminoru/ryu,habibiefaried/ryu,evanscottgray/ryu,torufuru/oolhackathon,StephenKing/summerschool-2015-ryu,Zouyiran/ryu,unifycore/ryu,fkakuma/ryu,gopchandani/ryu,fujita/ryu,samrussell/ryu,OpenState-SDN/ryu,yamt/ryu,pichuang/ryu,osrg/ryu,jalilm/ryu,Tesi-Luca-Davide/ryu,zangree/ryu,diogommartins/ryu,alanquillin/ryu,umkcdcrg01/ryu_openflow,osrg/ryu,torufuru/oolhackathon,yamt/ryu,iwaseyusuke/ryu,castroflavio/ryu,gopchandani/ryu,darjus-amzn/ryu,ynkjm/ryu,alyosha1879/ryu,takahashiminoru/ryu,diogommartins/ryu,lsqtongxin/ryu,Zouyiran/ryu,Tesi-Luca-Davide/ryu,umkcdcrg01/ryu_openflow,ttsubo/ryu,alanquillin/ryu,Tejas-Subramanya/RYU_MEC,alanquillin/ryu,ysywh/ryu,Zouyiran/ryu,pichuang/ryu,John-Lin/ryu,muzixing/ryu,ttsubo/ryu,darjus-amzn/ryu,mikhaelharswanto/ryu,hisaharu/ryu,ttsubo/ryu,pichuang/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,iwaseyusuke/ryu,lsqtongxin/ryu,lagopus/ryu-lagopus-ext,diogommartins/ryu,yamt/ryu,zangree/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,lzppp/mylearning,openvapour/ryu,citrix-openstack-build/ryu,Tejas-Subramanya/RYU_MEC,lagopus/ryu-lagopus-ext,OpenState-SDN/ryu,John-Lin/ryu,muzixing/ryu,zyq001/ryu,zyq001/ryu,fkakuma/ryu,o3project/ryu-oe,TakeshiTseng/ryu,jalilm/ryu,lsqtongxin/ryu,StephenKing/ryu,yamt/ryu,Zouyiran/ryu,ykaneko/ryu,sivaramakrishnansr/ryu,sivaramakrishnansr/ryu,elahejalalpour/ELRyu,samrussell/ryu,lzppp/mylearning,ynkjm/ryu,elahejalalpour/ELRyu,openvapour/ryu,torufuru/oolhackathon,darjus-amzn/ryu,jkoelker/ryu,hisaharu/ryu,habibiefaried/ryu,haniehrajabi/ryu,unifycore/ryu,yamada-h/ryu,castroflavio/ryu,yamada-h/ryu,Tejas-Subramanya/RYU_MEC,pichuang/ryu,lagopus/ryu-lagopus-ext,zyq001/ryu,gareging/SDN_Framework,openvapour/ryu,ntts-clo/mld-ryu,StephenKing/ryu,umkcdcrg01/ryu_openflow,shinpeimuraoka/ryu,habibiefaried/ryu,evanscottgray/ryu,StephenKing/ryu,John-Lin/ryu,osrg/ryu,ynkjm/ryu,sivaramakrishnansr/ryu,StephenKing/ryu,pichuang/ryu,habibiefaried/ryu,jalilm/ryu,gareging/SDN_Framework,ysywh/ryu,lzppp/mylearning,OpenState-SDN/ryu,citrix-openstack/build-ryu,haniehrajabi/ryu,jkoelker/ryu,Tejas-Subramanya/RYU_MEC,habibiefaried/ryu,alyosha1879/ryu,ysywh/ryu,shinpeimuraoka/ryu,muzixing/ryu,iwaseyusuke/ryu,StephenKing/summerschool-2015-ryu,ntts-clo/ryu,elahejalalpour/ELRyu,Zouyiran/ryu,lagopus/ryu-lagopus-ext,lsqtongxin/ryu,zyq001/ryu,darjus-amzn/ryu,Tesi-Luca-Davide/ryu,lsqtongxin/ryu,John-Lin/ryu,alanquillin/ryu,osrg/ryu,jalilm/ryu,gareging/SDN_Framework,OpenState-SDN/ryu,darjus-amzn/ryu,fkakuma/ryu,elahejalalpour/ELRyu,hisaharu/ryu,TakeshiTseng/ryu,jazzmes/ryu,sivaramakrishnansr/ryu,lzppp/mylearning,StephenKing/summerschool-2015-ryu,citrix-openstack/build-ryu,takahashiminoru/ryu,gareging/SDN_Framework,ntts-clo/mld-ryu,jazzmes/ryu,OpenState-SDN/ryu,castroflavio/ryu,torufuru/OFPatchPanel,umkcdcrg01/ryu_openflow,shinpeimuraoka/ryu,Tesi-Luca-Davide/ryu,yamt/ryu,StephenKing/summerschool-2015-ryu,muzixing/ryu,gopchandani/ryu,jazzmes/ryu,ysywh/ryu,jalilm/ryu,ttsubo/ryu,gareging/SDN_Framework,openvapour/ryu,alyosha1879/ryu,zyq001/ryu,Tejas-Subramanya/RYU_MEC,evanscottgray/ryu,John-Lin/ryu,haniehrajabi/ryu,ttsubo/ryu,haniehrajabi/ryu,lagopus/ryu-lagopus-ext,ynkjm/ryu,umkcdcrg01/ryu_openflow,haniehrajabi/ryu,alanquillin/ryu,diogommartins/ryu,osrg/ryu,iwaseyusuke/ryu,ykaneko/ryu,fujita/ryu,zangree/ryu,diogommartins/ryu,StephenKing/ryu,lzppp/mylearning,o3project/ryu-oe,gopchandani/ryu,mikhaelharswanto/ryu,jkoelker/ryu,hisaharu/ryu,fkakuma/ryu,TakeshiTseng/ryu,TakeshiTseng/ryu,openvapour/ryu,fkakuma/ryu,ynkjm/ryu,zangree/ryu,Tesi-Luca-Davide/ryu,alyosha1879/ryu,zangree/ryu,torufuru/OFPatchPanel,gopchandani/ryu,TakeshiTseng/ryu,StephenKing/summerschool-2015-ryu,ysywh/ryu,muzixing/ryu,citrix-openstack-build/ryu