Compute: replace incorrect instance object with dict
Compute: replace incorrect instance object with dict

Commit 171e5f8b127610d93a230a6f692d8fd5ea0d0301 updated security
groups instances to be instance objects. These are not instance objects
and are the instances stored in the database.

Change-Id: If79b5d4592e1ecbd860aa53e2d976b658c9227d0
Closes-bug: #1461065

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