Update fake flavor's root and ephemeral disk size
Update fake flavor's root and ephemeral disk size

In libvirt test, instance will be created with a predefined
flavor size, however the flavor's root disk and ephemeral disk
size is inconsistent to instance's root disk and ephemeral
disk size, this lead to some confusion in code review.
This patch makes them identical.

Change-Id: I06d78b8919edbd6a8a215015889619d6e7697150

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