Send usage event on revert_resize
Send usage event on revert_resize

We send a usage event when we resize.  revert_resize should also send
one to note a resize back to the original size.

Fixes bug 1071773

Change-Id: I96a14ef60fbfa98c75381c7251a217c3e65334ce

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