added util functions to get image service
added util functions to get image service
saleemjaveds/https-github.com-openstack-nova,luogangyi/bcec-nova,ruslanloman/nova,rahulunair/nova,NoBodyCam/TftpPxeBootBareMetal,CiscoSystems/nova,usc-isi/extra-specs,rickerc/nova_audit,mgagne/nova,sileht/deb-openstack-nova,vladikr/nova_drafts,psiwczak/openstack,barnsnake351/nova,Yusuke1987/openstack_template,jianghuaw/nova,dims/nova,maoy/zknova,NewpTone/stacklab-nova,JioCloud/nova,psiwczak/openstack,josephsuh/extra-specs,maheshp/novatest,LoHChina/nova,scripnichenko/nova,qwefi/nova,houshengbo/nova_vmware_compute_driver,klmitch/nova,jeffrey4l/nova,savi-dev/nova,alvarolopez/nova,jianghuaw/nova,scripnichenko/nova,viggates/nova,petrutlucian94/nova_dev,alaski/nova,savi-dev/nova,j-carpentier/nova,imsplitbit/nova,felixma/nova,takeshineshiro/nova,Juniper/nova,Juniper/nova,sileht/deb-openstack-nova,noironetworks/nova,whitepages/nova,KarimAllah/nova,bgxavier/nova,joker946/nova,cernops/nova,double12gzh/nova,gooddata/openstack-nova,rajalokan/nova,belmiromoreira/nova,tanglei528/nova,jianghuaw/nova,eayunstack/nova,NeCTAR-RC/nova,devendermishrajio/nova,ted-gould/nova,zaina/nova,shail2810/nova,shail2810/nova,savi-dev/nova,isyippee/nova,tianweizhang/nova,salv-orlando/MyRepo,sridevikoushik31/nova,TwinkleChawla/nova,aristanetworks/arista-ovs-nova,devoid/nova,usc-isi/nova,badock/nova,blueboxgroup/nova,qwefi/nova,mandeepdhami/nova,TwinkleChawla/nova,klmitch/nova,isyippee/nova,whitepages/nova,gooddata/openstack-nova,NewpTone/stacklab-nova,joker946/nova,Stavitsky/nova,eharney/nova,CloudServer/nova,Yuriy-Leonov/nova,petrutlucian94/nova,mikalstill/nova,gspilio/nova,yrobla/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,fnordahl/nova,paulmathews/nova,varunarya10/nova_test_latest,MountainWei/nova,plumgrid/plumgrid-nova,TieWei/nova,yrobla/nova,noironetworks/nova,sebrandon1/nova,fajoy/nova,imsplitbit/nova,CloudServer/nova,mahak/nova,watonyweng/nova,vmturbo/nova,leilihh/novaha,russellb/nova,cloudbase/nova,sridevikoushik31/openstack,blueboxgroup/nova,cernops/nova,maheshp/novatest,maheshp/novatest,rajalokan/nova,plumgrid/plumgrid-nova,CiscoSystems/nova,yatinkumbhare/openstack-nova,devendermishrajio/nova,JioCloud/nova_test_latest,iuliat/nova,paulmathews/nova,akash1808/nova,affo/nova,houshengbo/nova_vmware_compute_driver,zaina/nova,mmnelemane/nova,cyx1231st/nova,leilihh/novaha,usc-isi/nova,JianyuWang/nova,vmturbo/nova,dawnpower/nova,zhimin711/nova,bgxavier/nova,ntt-sic/nova,fnordahl/nova,watonyweng/nova,kimjaejoong/nova,mahak/nova,OpenAcademy-OpenStack/nova-scheduler,CEG-FYP-OpenStack/scheduler,gspilio/nova,bclau/nova,cloudbase/nova-virtualbox,sacharya/nova,tudorvio/nova,ewindisch/nova,Tehsmash/nova,citrix-openstack-build/nova,gooddata/openstack-nova,sebrandon1/nova,iuliat/nova,DirectXMan12/nova-hacking,paulmathews/nova,jianghuaw/nova,berrange/nova,Metaswitch/calico-nova,Triv90/Nova,eayunstack/nova,leilihh/nova,cloudbase/nova-virtualbox,sridevikoushik31/nova,mahak/nova,vmturbo/nova,alaski/nova,angdraug/nova,redhat-openstack/nova,usc-isi/extra-specs,orbitfp7/nova,usc-isi/extra-specs,silenceli/nova,gooddata/openstack-nova,klmitch/nova,akash1808/nova_test_latest,Triv90/Nova,salv-orlando/MyRepo,shootstar/novatest,tealover/nova,phenoxim/nova,tianweizhang/nova,yosshy/nova,apporc/nova,badock/nova,russellb/nova,cyx1231st/nova,klmitch/nova,ted-gould/nova,cloudbase/nova,TieWei/nova,BeyondTheClouds/nova,shahar-stratoscale/nova,tanglei528/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,rajalokan/nova,devoid/nova,orbitfp7/nova,rahulunair/nova,alvarolopez/nova,rickerc/nova_audit,sridevikoushik31/nova,eneabio/nova,phenoxim/nova,silenceli/nova,nikesh-mahalka/nova,CEG-FYP-OpenStack/scheduler,josephsuh/extra-specs,adelina-t/nova,dstroppa/openstack-smartos-nova-grizzly,ntt-sic/nova,belmiromoreira/nova,dawnpower/nova,j-carpentier/nova,alexandrucoman/vbox-nova-driver,cernops/nova,nikesh-mahalka/nova,maelnor/nova,eonpatapon/nova,hanlind/nova,virtualopensystems/nova,mgagne/nova,BeyondTheClouds/nova,mikalstill/nova,KarimAllah/nova,yatinkumbhare/openstack-nova,aristanetworks/arista-ovs-nova,cloudbau/nova,raildo/nova,hanlind/nova,varunarya10/nova_test_latest,NeCTAR-RC/nova,psiwczak/openstack,bigswitch/nova,NoBodyCam/TftpPxeBootBareMetal,bclau/nova,gspilio/nova,projectcalico/calico-nova,akash1808/nova,edulramirez/nova,Juniper/nova,LoHChina/nova,Francis-Liu/animated-broccoli,angdraug/nova,rajalokan/nova,SUSE-Cloud/nova,affo/nova,luogangyi/bcec-nova,vmturbo/nova,cloudbau/nova,ewindisch/nova,sridevikoushik31/openstack,rahulunair/nova,takeshineshiro/nova,dstroppa/openstack-smartos-nova-grizzly,dstroppa/openstack-smartos-nova-grizzly,yrobla/nova,devendermishrajio/nova_test_latest,jeffrey4l/nova,aristanetworks/arista-ovs-nova,hanlind/nova,tangfeixiong/nova,devendermishrajio/nova_test_latest,salv-orlando/MyRepo,JianyuWang/nova,edulramirez/nova,rrader/nova-docker-plugin,virtualopensystems/nova,double12gzh/nova,Juniper/nova,MountainWei/nova,eonpatapon/nova,felixma/nova,rrader/nova-docker-plugin,fajoy/nova,tangfeixiong/nova,leilihh/nova,eneabio/nova,maelnor/nova,maoy/zknova,Yuriy-Leonov/nova,eharney/nova,NoBodyCam/TftpPxeBootBareMetal,barnsnake351/nova,maoy/zknova,CCI-MOC/nova,josephsuh/extra-specs,sileht/deb-openstack-nova,spring-week-topos/nova-week,thomasem/nova,cloudbase/nova,JioCloud/nova,shootstar/novatest,sridevikoushik31/nova,openstack/nova,tealover/nova,Francis-Liu/animated-broccoli,mikalstill/nova,openstack/nova,Tehsmash/nova,projectcalico/calico-nova,OpenAcademy-OpenStack/nova-scheduler,mmnelemane/nova,alexandrucoman/vbox-nova-driver,citrix-openstack-build/nova,bigswitch/nova,shahar-stratoscale/nova,thomasem/nova,sacharya/nova,redhat-openstack/nova,SUSE-Cloud/nova,Metaswitch/calico-nova,petrutlucian94/nova_dev,CCI-MOC/nova,adelina-t/nova,viggates/nova,russellb/nova,akash1808/nova_test_latest,raildo/nova,Triv90/Nova,ruslanloman/nova,petrutlucian94/nova,zzicewind/nova,Yusuke1987/openstack_template,dims/nova,BeyondTheClouds/nova,apporc/nova,DirectXMan12/nova-hacking,fajoy/nova,mandeepdhami/nova,yosshy/nova,zzicewind/nova,berrange/nova,JioCloud/nova_test_latest,spring-week-topos/nova-week,vladikr/nova_drafts,kimjaejoong/nova,tudorvio/nova,NewpTone/stacklab-nova,Stavitsky/nova,houshengbo/nova_vmware_compute_driver,DirectXMan12/nova-hacking,openstack/nova,usc-isi/nova,eneabio/nova,zhimin711/nova,sebrandon1/nova,sridevikoushik31/openstack,KarimAllah/nova,saleemjaveds/https-github.com-openstack-nova