don't check for service enabled
don't check for service enabled

service enabled is something that's not required for sysstat and
friends, because instead we actually can do this with screen_it.

Change-Id: I4aa5787101cb0def46690f38a7f82effbb85f502

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