Fix use of bare list/dict types in instance_group object
Fix use of bare list/dict types in instance_group object

The instance_group object was merged before we had helpers for
dict and list objects of strings. This makes that object use those
for schema safety.

Change-Id: I1f68e43a83f140f7b29b17c0961b267e64e48390
Closes-bug: 1221383

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