removed unecessary lines for docker install
removed unecessary lines for docker install

* script was trying to copy file from a source
	that doesn't exist to destination that does.
* variable DOCKER_BRANCH no longer used.

Change-Id: I50fd55e97dfc4eaaa3c1f2bfc42e8cfc0e76cdf4

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