doc/app/ofctl_rest: Update description for action type of experimenter
doc/app/ofctl_rest: Update description for action type of experimenter

Signed-off-by: Minoru TAKAHASHI <1b2dd9db86d9aa32ea109f1bd7f72bf49e90d10b@gmail.com>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

gareging/SDN_Framework,lagopus/ryu-lagopus-ext,Tejas-Subramanya/RYU_MEC,osrg/ryu,hisaharu/ryu,takahashiminoru/ryu,fkakuma/ryu,zangree/ryu,fujita/ryu,pichuang/ryu,iwaseyusuke/ryu,fujita/ryu,osrg/ryu,takahashiminoru/ryu,zangree/ryu,iwaseyusuke/ryu,gareging/SDN_Framework,takahashiminoru/ryu,TakeshiTseng/ryu,Tejas-Subramanya/RYU_MEC,pichuang/ryu,shinpeimuraoka/ryu,hisaharu/ryu,lagopus/ryu-lagopus-ext,Tejas-Subramanya/RYU_MEC,lagopus/ryu-lagopus-ext,zangree/ryu,shinpeimuraoka/ryu,fujita/ryu,TakeshiTseng/ryu,iwaseyusuke/ryu,hisaharu/ryu,zangree/ryu,lagopus/ryu-lagopus-ext,Tejas-Subramanya/RYU_MEC,TakeshiTseng/ryu,fkakuma/ryu,takahashiminoru/ryu,fkakuma/ryu,Tejas-Subramanya/RYU_MEC,gareging/SDN_Framework,lagopus/ryu-lagopus-ext,TakeshiTseng/ryu,zangree/ryu,hisaharu/ryu,shinpeimuraoka/ryu,pichuang/ryu,shinpeimuraoka/ryu,pichuang/ryu,fujita/ryu,fkakuma/ryu,osrg/ryu,takahashiminoru/ryu,shinpeimuraoka/ryu,osrg/ryu,iwaseyusuke/ryu,fkakuma/ryu,TakeshiTseng/ryu,fujita/ryu,iwaseyusuke/ryu,pichuang/ryu,osrg/ryu,gareging/SDN_Framework,hisaharu/ryu,gareging/SDN_Framework