fix tgt to use 'service' instead of upstart calls
fix tgt to use 'service' instead of upstart calls

the comments in here were largely about oneric, which we don't
support any more. service is installed in a precise environment,
and will support debian and the upcoming transition to systemd
better, so use that instead.

Change-Id: If15493549a8c93a7387df9b3bba31443aed46995

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