Use unittest help in test_ip.sh
Use unittest help in test_ip.sh

Use the unittest helper to track test runs and correctly exit with a
failure code if there is a problem

Change-Id: Ie62f354a8cd3b8fd5986e6943a073f7955fb55ba

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