ofproto_v1_5_parser: Add OPFStats parser for Flow Stats Structures
ofproto_v1_5_parser: Add OPFStats parser for Flow Stats Structures

This patch adds OPFStats class which has simpler API with OFPMatch class.

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

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