Add configurations for the OpenFlow Agent mechanism driver
Add configurations for the OpenFlow Agent mechanism driver

This patch supports configurations for an environment of the OpenFlow Agent mechanism driver
Set the following variables in a localrc to be ran this mechanism driver.

Q_ML2_PLUGIN_MECHANISM_DRIVERS=ofagent
Q_AGENT=ofagent

Implements: blueprint ryu-ml2-driver
Change-Id: I774da9a26f241487dfa4ec124b12f528704d860b

innodee/openstackk,bigswitch/devstack,Juniper/devstack,group-policy/devstack,pczerkas/devstack,parul24/devstack,varunarya10/devstack,kplus/devstack-moonshot,richliu/devstack,mssumanth/devstack,HPCHub/devstack,andrewrothstein/devstack,wenhuizhang/devstack,pombredanne/devstack,JioCloud/devstack,upadhyay-prashant/devstack,herrsechs/devstack,j4/devstack,atulpatil301/devstack,mc2014/devstack,eshnil2000/devstack,bljgaurav/openstack-test,samgoon/devstack,NaokiMiyata/devstack,flavio-fernandes/devstack,neerja28/Devstack_GlusterFS,vsham20/devstack,bq-xiao/devstack,atulpatil301/devstack,eharney/devstack,LoHChina/devstack,sequenceiq/devstack,bswartz/devstack,bq-xiao/devstack,kplus/devstack-moonshot,williamthegrey/devstack,nawawi/openstack,liuquansheng47/devstack,prithivm/branch01,dtroyer/devstack,ozamiatin/devstack,vishnugonela/devstack,richliu/devstack,pacinete/devstack,group-policy/devstack,LoHChina/devstack,nuxeh/devstack,jamielennox/devstack,BSJAIN92/OpenStack,mc2014/devstack,samgoon/devstack,sc68cal/devstack,NaokiMiyata/devstack,wenhuizhang/devstack,herrsechs/devstack,mssumanth/devstack,CloudServer/devstack,BSJAIN92/OpenStack,j4/devstack,costingalan/devstack,TwinkleChawla/devstack,prithivm/branch01,srics/devstack,vishnugonela/devstack,dirkmueller/devstack,openstack-dev/devstack,parul24/devstack,CloudServer/devstack,nuxeh/devstack,promptworks/devstack,andrewrothstein/devstack,costingalan/devstack,sc68cal/devstack,eharney/devstack,noironetworks/devstack,tianweizhang/devstack,virtualopensystems/devstack,bigswitch/devstack,noironetworks/devstack,affo/devstack,rushiagr/devstack,openstack-dev/devstack,avvocatodemarchis/devstack,olivierlemasle/devstack,varunarya10/devstack,mmasaki/devstack,avvocatodemarchis/devstack,dtroyer/devstack,rushiagr/devstack,neerja28/Devstack_GlusterFS,vsham20/devstack,bljgaurav/openstack-test,pombredanne/devstack,dirkmueller/devstack,ozamiatin/devstack,bswartz/devstack,thomasem/devstack,affo/devstack,Mahito/devstack,TwinkleChawla/devstack,flavio-fernandes/devstack,tianweizhang/devstack,sequenceiq/devstack,olivierlemasle/devstack,liuquansheng47/devstack,upadhyay-prashant/devstack,Mahito/devstack,HPCHub/devstack,mmasaki/devstack,nawawi/openstack,pacinete/devstack,promptworks/devstack,thomasem/devstack,pczerkas/devstack