Fix trove guest confing to ignore user os_admin
Fix trove guest confing to ignore user os_admin

This value of ignore_users in the guest config needs to be set
correctly to ignore the local os_admin user for the trove functional
tests to pass in a devstack-gate environment.

Change-Id: Ia31dfe8f2eab4b24790b6be0dbc474cf50f39afa

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