add eventlet to test requirement
add eventlet to test requirement

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

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