Add network block device package to support LXC rootfs mount on it.
Add network block device package to support LXC rootfs mount on it.

This fix the bug 970645.

Change-Id: If9fde90ac71cdaaff0d006a4df1a325f6f656744

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