libvirt: have _get_guest_numa_config return a named tuple
libvirt: have _get_guest_numa_config return a named tuple

Have the method return an object. This makes the code a lot cleaner.

Change-Id: I209325ff587f6bca366a377475b03772daf519ba

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