Fix syntax error in lib/tempest
Fix syntax error in lib/tempest

Fix syntax error in lib/tempest:
 Created tempest configuration file:
 21:06:30 ++ CINDER_MULTI_LVM_BACKEND=False
 21:06:30 ++ '[' False == 'True ]'
 21:06:30 /home/stack/devstack/lib/tempest: line 278: [: missing `]'

Change-Id: Ib4e393dad12751bdfb0e6f8fac3accd380a1f760

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