Refactor vm_vdi_cleaner.py connection use
Refactor vm_vdi_cleaner.py connection use

cleanup_instance() would fail because of using old get_connection().
This refactors everything to use XenAPIDriver().

Fixes bug 1017282

Change-Id: I8822f322bb8f60e5992afbe1feb45c0f4fffc893

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