Add VDI chain cleanup script.
Add VDI chain cleanup script.

References bug 949477

Change-Id: I819d4ed56675a4ef4e46adca2978b433386e128d

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