Clean up stale Datapath objects in the ofctl_service application
Clean up stale Datapath objects in the ofctl_service application

A quick patch to clean up stale Datapath objects in the ofctl_service application.

Signed-off-by: Victor J. Orlikowski <72c670095bbd38b67036897d6da3425e0645f984@duke.edu>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

fujita/ryu,iwaseyusuke/ryu,osrg/ryu,shinpeimuraoka/ryu,gareging/SDN_Framework,shinpeimuraoka/ryu,fkakuma/ryu,fkakuma/ryu,lagopus/ryu-lagopus-ext,pichuang/ryu,shinpeimuraoka/ryu,fujita/ryu,TakeshiTseng/ryu,TakeshiTseng/ryu,iwaseyusuke/ryu,pichuang/ryu,gareging/SDN_Framework,TakeshiTseng/ryu,osrg/ryu,osrg/ryu,gareging/SDN_Framework,lagopus/ryu-lagopus-ext,pichuang/ryu,shinpeimuraoka/ryu,fujita/ryu,TakeshiTseng/ryu,lagopus/ryu-lagopus-ext,osrg/ryu,osrg/ryu,TakeshiTseng/ryu,fujita/ryu,iwaseyusuke/ryu,iwaseyusuke/ryu,iwaseyusuke/ryu,fkakuma/ryu,gareging/SDN_Framework,lagopus/ryu-lagopus-ext,pichuang/ryu,lagopus/ryu-lagopus-ext,fkakuma/ryu,fujita/ryu,pichuang/ryu,fkakuma/ryu,shinpeimuraoka/ryu,gareging/SDN_Framework