Support multiple config file options on quantum-server command line
Support multiple config file options on quantum-server command line

fix bug #1156831

Change-Id: Id05929c3114bc385c09fc25179cc15a358d38189

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