Adding tempest_roles when auth_version is v3
Adding tempest_roles when auth_version is v3

With identity v3 the _member_ role is not added on the projects
automatically for the user when it's created.

Setting _member_ to tempest_roles so that tempest adds the role.

Change-Id: Iaae9286ecc6f019d36261a5c450068a650e24a28

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