enable xtrace for keystone_data.sh
enable xtrace for keystone_data.sh

This is useful for troubleshooting keystone errors.

Change-Id: I9b50e88e30d71afd17549d42f04f07a95815906e

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