Improve savanna-dashboard installation
Improve savanna-dashboard installation

* split configurations setting to one-per-line;
* don't set SAVANNA_URL in horizon configs - we're now using endpoits
  keystone to find corresponding edpoint.

Change-Id: I9497a511656a2f70e923b651c66c5ef2917a0939

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