refactor flavor db fakes in prep for object-ify flavors
refactor flavor db fakes in prep for object-ify flavors

This change is to help split up the patches for object-ifying flavors.
It refactors db fakes to provide default values for fields that are
not nullable in flavor objects.

Change-Id: I18575703cd5c52d4f446c9bca1edd7baf33b416f

adelina-t/nova,j-carpentier/nova,kimjaejoong/nova,klmitch/nova,whitepages/nova,cyx1231st/nova,tealover/nova,alexandrucoman/vbox-nova-driver,BeyondTheClouds/nova,eonpatapon/nova,watonyweng/nova,belmiromoreira/nova,bgxavier/nova,mahak/nova,cloudbase/nova,nikesh-mahalka/nova,cloudbase/nova,zzicewind/nova,double12gzh/nova,iuliat/nova,cloudbase/nova-virtualbox,alvarolopez/nova,dims/nova,gooddata/openstack-nova,CEG-FYP-OpenStack/scheduler,maelnor/nova,phenoxim/nova,belmiromoreira/nova,gooddata/openstack-nova,mikalstill/nova,JianyuWang/nova,LoHChina/nova,Francis-Liu/animated-broccoli,akash1808/nova,gooddata/openstack-nova,klmitch/nova,affo/nova,hanlind/nova,MountainWei/nova,Juniper/nova,CloudServer/nova,hanlind/nova,tealover/nova,varunarya10/nova_test_latest,takeshineshiro/nova,nikesh-mahalka/nova,mikalstill/nova,iuliat/nova,bigswitch/nova,cloudbase/nova-virtualbox,edulramirez/nova,isyippee/nova,shail2810/nova,isyippee/nova,devendermishrajio/nova_test_latest,alaski/nova,eonpatapon/nova,klmitch/nova,Tehsmash/nova,Metaswitch/calico-nova,ted-gould/nova,phenoxim/nova,jeffrey4l/nova,projectcalico/calico-nova,ruslanloman/nova,zhimin711/nova,scripnichenko/nova,Francis-Liu/animated-broccoli,barnsnake351/nova,angdraug/nova,openstack/nova,mahak/nova,BeyondTheClouds/nova,jianghuaw/nova,dawnpower/nova,JioCloud/nova,rajalokan/nova,projectcalico/calico-nova,alexandrucoman/vbox-nova-driver,Tehsmash/nova,blueboxgroup/nova,tangfeixiong/nova,rahulunair/nova,akash1808/nova_test_latest,devendermishrajio/nova,Stavitsky/nova,mikalstill/nova,BeyondTheClouds/nova,badock/nova,jianghuaw/nova,alaski/nova,j-carpentier/nova,jeffrey4l/nova,tangfeixiong/nova,noironetworks/nova,Juniper/nova,bigswitch/nova,double12gzh/nova,TwinkleChawla/nova,raildo/nova,felixma/nova,apporc/nova,CCI-MOC/nova,zaina/nova,tudorvio/nova,devendermishrajio/nova_test_latest,mmnelemane/nova,joker946/nova,adelina-t/nova,JioCloud/nova,vmturbo/nova,JianyuWang/nova,NeCTAR-RC/nova,badock/nova,openstack/nova,thomasem/nova,rajalokan/nova,Stavitsky/nova,orbitfp7/nova,ruslanloman/nova,silenceli/nova,TwinkleChawla/nova,vmturbo/nova,whitepages/nova,cernops/nova,jianghuaw/nova,JioCloud/nova_test_latest,sebrandon1/nova,vmturbo/nova,tudorvio/nova,mandeepdhami/nova,varunarya10/nova_test_latest,rahulunair/nova,openstack/nova,rajalokan/nova,kimjaejoong/nova,cernops/nova,devendermishrajio/nova,Metaswitch/calico-nova,cloudbase/nova,watonyweng/nova,silenceli/nova,apporc/nova,thomasem/nova,JioCloud/nova_test_latest,petrutlucian94/nova,zhimin711/nova,LoHChina/nova,sebrandon1/nova,yosshy/nova,fnordahl/nova,maelnor/nova,yatinkumbhare/openstack-nova,cernops/nova,klmitch/nova,mgagne/nova,gooddata/openstack-nova,mgagne/nova,dims/nova,mandeepdhami/nova,CloudServer/nova,cyx1231st/nova,Yusuke1987/openstack_template,angdraug/nova,ted-gould/nova,scripnichenko/nova,noironetworks/nova,yosshy/nova,CEG-FYP-OpenStack/scheduler,shail2810/nova,affo/nova,sebrandon1/nova,rahulunair/nova,zzicewind/nova,NeCTAR-RC/nova,vmturbo/nova,felixma/nova,takeshineshiro/nova,edulramirez/nova,yatinkumbhare/openstack-nova,raildo/nova,rajalokan/nova,fnordahl/nova,akash1808/nova_test_latest,hanlind/nova,petrutlucian94/nova,Juniper/nova,jianghuaw/nova,bgxavier/nova,mahak/nova,mmnelemane/nova,orbitfp7/nova,akash1808/nova,zaina/nova,CCI-MOC/nova,alvarolopez/nova,joker946/nova,barnsnake351/nova,blueboxgroup/nova,dawnpower/nova,Juniper/nova,MountainWei/nova,Yusuke1987/openstack_template