ofproto_v1_5_parser: Add OFPGroupBucketProp support
ofproto_v1_5_parser: Add OFPGroupBucketProp support

OpenFlow Spec 1.5 introduces group bucket properties to extend
group buckets and redefine bucket fields weight, watch_port and
watch_group as group bucket properties.

This patch adds group bucket properties support and restructures
bucket fields.

Signed-off-by: IWASE Yusuke <bb80e84cc9f5a8f01385872ee89032beb5d4eba7@gmail.com>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

gareging/SDN_Framework,zyq001/ryu,fujita/ryu,StephenKing/ryu,fkakuma/ryu,hisaharu/ryu,zangree/ryu,gareging/SDN_Framework,zyq001/ryu,alanquillin/ryu,osrg/ryu,lagopus/ryu-lagopus-ext,pichuang/ryu,takahashiminoru/ryu,iwaseyusuke/ryu,zangree/ryu,alanquillin/ryu,OpenState-SDN/ryu,elahejalalpour/ELRyu,fujita/ryu,shinpeimuraoka/ryu,habibiefaried/ryu,fujita/ryu,lagopus/ryu-lagopus-ext,alanquillin/ryu,ttsubo/ryu,lagopus/ryu-lagopus-ext,OpenState-SDN/ryu,OpenState-SDN/ryu,hisaharu/ryu,Zouyiran/ryu,fkakuma/ryu,Zouyiran/ryu,osrg/ryu,ttsubo/ryu,OpenState-SDN/ryu,elahejalalpour/ELRyu,pichuang/ryu,shinpeimuraoka/ryu,takahashiminoru/ryu,John-Lin/ryu,darjus-amzn/ryu,pichuang/ryu,lagopus/ryu-lagopus-ext,diogommartins/ryu,John-Lin/ryu,ttsubo/ryu,fkakuma/ryu,osrg/ryu,Tejas-Subramanya/RYU_MEC,habibiefaried/ryu,iwaseyusuke/ryu,ttsubo/ryu,hisaharu/ryu,pichuang/ryu,iwaseyusuke/ryu,zangree/ryu,zyq001/ryu,fujita/ryu,darjus-amzn/ryu,shinpeimuraoka/ryu,zangree/ryu,darjus-amzn/ryu,takahashiminoru/ryu,habibiefaried/ryu,gareging/SDN_Framework,iwaseyusuke/ryu,diogommartins/ryu,pichuang/ryu,StephenKing/ryu,fujita/ryu,elahejalalpour/ELRyu,hisaharu/ryu,osrg/ryu,lagopus/ryu-lagopus-ext,TakeshiTseng/ryu,Tejas-Subramanya/RYU_MEC,TakeshiTseng/ryu,iwaseyusuke/ryu,ttsubo/ryu,habibiefaried/ryu,diogommartins/ryu,takahashiminoru/ryu,Tejas-Subramanya/RYU_MEC,Zouyiran/ryu,OpenState-SDN/ryu,zyq001/ryu,TakeshiTseng/ryu,hisaharu/ryu,Tejas-Subramanya/RYU_MEC,TakeshiTseng/ryu,John-Lin/ryu,Zouyiran/ryu,shinpeimuraoka/ryu,alanquillin/ryu,darjus-amzn/ryu,zangree/ryu,John-Lin/ryu,gareging/SDN_Framework,gareging/SDN_Framework,takahashiminoru/ryu,alanquillin/ryu,fkakuma/ryu,Tejas-Subramanya/RYU_MEC,John-Lin/ryu,StephenKing/ryu,Zouyiran/ryu,elahejalalpour/ELRyu,diogommartins/ryu,fkakuma/ryu,darjus-amzn/ryu,StephenKing/ryu,habibiefaried/ryu,TakeshiTseng/ryu,shinpeimuraoka/ryu,zyq001/ryu,diogommartins/ryu,elahejalalpour/ELRyu,StephenKing/ryu,osrg/ryu