Convert test_compute_utils to use Instance object
Convert test_compute_utils to use Instance object

This simply converts the instance creation code in test_compute_utils
to use the instance object.

Change-Id: I1b0189e7c6619bc77c4681b207c019c883a114b7

mikalstill/nova,scripnichenko/nova,klmitch/nova,MountainWei/nova,LoHChina/nova,mahak/nova,mahak/nova,gooddata/openstack-nova,raildo/nova,mmnelemane/nova,JioCloud/nova_test_latest,dims/nova,edulramirez/nova,j-carpentier/nova,Juniper/nova,apporc/nova,shail2810/nova,tudorvio/nova,zhimin711/nova,felixma/nova,mikalstill/nova,hanlind/nova,takeshineshiro/nova,rahulunair/nova,zhimin711/nova,devendermishrajio/nova_test_latest,rajalokan/nova,klmitch/nova,iuliat/nova,gooddata/openstack-nova,zzicewind/nova,eonpatapon/nova,openstack/nova,cloudbase/nova,jianghuaw/nova,CCI-MOC/nova,devendermishrajio/nova,devendermishrajio/nova,whitepages/nova,Francis-Liu/animated-broccoli,rajalokan/nova,alaski/nova,nikesh-mahalka/nova,ted-gould/nova,cloudbase/nova,felixma/nova,jianghuaw/nova,zaina/nova,noironetworks/nova,vmturbo/nova,jianghuaw/nova,mahak/nova,BeyondTheClouds/nova,rahulunair/nova,alaski/nova,zaina/nova,varunarya10/nova_test_latest,mmnelemane/nova,akash1808/nova_test_latest,jeffrey4l/nova,NeCTAR-RC/nova,cernops/nova,NeCTAR-RC/nova,hanlind/nova,watonyweng/nova,barnsnake351/nova,Juniper/nova,BeyondTheClouds/nova,LoHChina/nova,j-carpentier/nova,hanlind/nova,CEG-FYP-OpenStack/scheduler,phenoxim/nova,tudorvio/nova,isyippee/nova,ruslanloman/nova,cloudbase/nova,klmitch/nova,klmitch/nova,shail2810/nova,bigswitch/nova,nikesh-mahalka/nova,CCI-MOC/nova,jianghuaw/nova,apporc/nova,yosshy/nova,zzicewind/nova,vmturbo/nova,rahulunair/nova,varunarya10/nova_test_latest,Juniper/nova,edulramirez/nova,whitepages/nova,JioCloud/nova_test_latest,raildo/nova,TwinkleChawla/nova,Juniper/nova,vmturbo/nova,cernops/nova,Francis-Liu/animated-broccoli,isyippee/nova,rajalokan/nova,yosshy/nova,dims/nova,gooddata/openstack-nova,mikalstill/nova,ruslanloman/nova,scripnichenko/nova,akash1808/nova_test_latest,cernops/nova,noironetworks/nova,JianyuWang/nova,takeshineshiro/nova,openstack/nova,phenoxim/nova,sebrandon1/nova,jeffrey4l/nova,JianyuWang/nova,gooddata/openstack-nova,rajalokan/nova,sebrandon1/nova,watonyweng/nova,bigswitch/nova,devendermishrajio/nova_test_latest,fnordahl/nova,cyx1231st/nova,BeyondTheClouds/nova,cyx1231st/nova,openstack/nova,MountainWei/nova,eonpatapon/nova,iuliat/nova,barnsnake351/nova,CEG-FYP-OpenStack/scheduler,vmturbo/nova,ted-gould/nova,fnordahl/nova,TwinkleChawla/nova,sebrandon1/nova