libvirt: reduce indentation in is_vif_model_valid_for_virt
libvirt: reduce indentation in is_vif_model_valid_for_virt

For some reason the is_vif_model_valid_for_virt method is using
8 space indentation instead of the normal 4 spaces.

Change-Id: Ibbc86af5fbea3a115d344907a1d95fb184b61ebc

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