Add missing tests for nova.db.api.instance_metadata_*
Add missing tests for nova.db.api.instance_metadata_*

blueprint db-api-tests

Change-Id: Ied09a4aacd3709cd4e63f939df3b812c6ad2533e

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