Set QPID_HOST parameter to better support multi-node mode
Set QPID_HOST parameter to better support multi-node mode

When deploying OpenStack in a multi-node configuration,
the Qpid clients need the hostname of the potentially
remote Qpid server in order to permit the necessary RPC
communication between components.

Fixes bug #1196521

Change-Id: Iee3c3747cedea9488ec345e78f8eddbc6e850573

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