replace left quantum string for enable_lb
replace left quantum string for enable_lb

writing the correct config for horizon to show LBaaS entry properly
like:

OPENSTACK_NEUTRON_NETWORK = {
    'enable_lb': True
}

Change-Id: I7f522a150a3732ee734f2b818910ff92c8c73028
Fixes: bug #1200098

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