Sync db.models and migrations.
Sync db.models and migrations.

This patch syncs models with migrations for:
- DNSDomain
- AggregateMetadata
- BandwidthUsage

Blueprint: db-sync-models-with-migrations

Change-Id: I09c48bac5ed780a7ec1b89cc8ce0684f4903d9dd

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