libvirt: fix comment for get_num_instances
libvirt: fix comment for get_num_instances

The comment had an invalid function name.

Change-Id: Iea10186a6cd649a42dadc631bef5f0e32fe2f479

NeCTAR-RC/nova,cloudbase/nova-virtualbox,varunarya10/nova_test_latest,jianghuaw/nova,cloudbase/nova,bigswitch/nova,gooddata/openstack-nova,bgxavier/nova,kimjaejoong/nova,sebrandon1/nova,kimjaejoong/nova,tianweizhang/nova,rahulunair/nova,MountainWei/nova,CiscoSystems/nova,joker946/nova,CloudServer/nova,redhat-openstack/nova,blueboxgroup/nova,cloudbase/nova,noironetworks/nova,jeffrey4l/nova,isyippee/nova,NeCTAR-RC/nova,mikalstill/nova,rajalokan/nova,CCI-MOC/nova,whitepages/nova,vmturbo/nova,alaski/nova,ruslanloman/nova,zzicewind/nova,orbitfp7/nova,apporc/nova,takeshineshiro/nova,CEG-FYP-OpenStack/scheduler,jianghuaw/nova,belmiromoreira/nova,Juniper/nova,raildo/nova,Metaswitch/calico-nova,tealover/nova,akash1808/nova_test_latest,openstack/nova,Francis-Liu/animated-broccoli,BeyondTheClouds/nova,Francis-Liu/animated-broccoli,barnsnake351/nova,mikalstill/nova,TwinkleChawla/nova,thomasem/nova,nikesh-mahalka/nova,klmitch/nova,yatinkumbhare/openstack-nova,tianweizhang/nova,angdraug/nova,Stavitsky/nova,badock/nova,yosshy/nova,belmiromoreira/nova,TwinkleChawla/nova,gooddata/openstack-nova,Juniper/nova,double12gzh/nova,tealover/nova,alexandrucoman/vbox-nova-driver,CEG-FYP-OpenStack/scheduler,bigswitch/nova,tangfeixiong/nova,apporc/nova,alvarolopez/nova,whitepages/nova,tanglei528/nova,eayunstack/nova,openstack/nova,nikesh-mahalka/nova,rajalokan/nova,cloudbase/nova-virtualbox,devendermishrajio/nova_test_latest,yatinkumbhare/openstack-nova,jianghuaw/nova,Yusuke1987/openstack_template,tangfeixiong/nova,devendermishrajio/nova_test_latest,scripnichenko/nova,Metaswitch/calico-nova,CloudServer/nova,projectcalico/calico-nova,scripnichenko/nova,mmnelemane/nova,sebrandon1/nova,redhat-openstack/nova,saleemjaveds/https-github.com-openstack-nova,eonpatapon/nova,watonyweng/nova,ted-gould/nova,zhimin711/nova,edulramirez/nova,mandeepdhami/nova,rajalokan/nova,isyippee/nova,alaski/nova,BeyondTheClouds/nova,maelnor/nova,j-carpentier/nova,saleemjaveds/https-github.com-openstack-nova,bgxavier/nova,iuliat/nova,silenceli/nova,akash1808/nova_test_latest,Tehsmash/nova,barnsnake351/nova,j-carpentier/nova,mandeepdhami/nova,mgagne/nova,JioCloud/nova_test_latest,dims/nova,raildo/nova,openstack/nova,zaina/nova,vladikr/nova_drafts,dawnpower/nova,mikalstill/nova,LoHChina/nova,klmitch/nova,adelina-t/nova,hanlind/nova,fnordahl/nova,klmitch/nova,cernops/nova,iuliat/nova,zhimin711/nova,joker946/nova,tudorvio/nova,mgagne/nova,fnordahl/nova,ruslanloman/nova,Juniper/nova,cyx1231st/nova,rahulunair/nova,JianyuWang/nova,mahak/nova,tudorvio/nova,Yusuke1987/openstack_template,shail2810/nova,Tehsmash/nova,zzicewind/nova,berrange/nova,eonpatapon/nova,gooddata/openstack-nova,alvarolopez/nova,mahak/nova,virtualopensystems/nova,felixma/nova,ted-gould/nova,Juniper/nova,vmturbo/nova,jianghuaw/nova,watonyweng/nova,rajalokan/nova,gooddata/openstack-nova,dawnpower/nova,cernops/nova,affo/nova,petrutlucian94/nova,double12gzh/nova,eayunstack/nova,akash1808/nova,CiscoSystems/nova,shail2810/nova,viggates/nova,JianyuWang/nova,varunarya10/nova_test_latest,vladikr/nova_drafts,klmitch/nova,devendermishrajio/nova,petrutlucian94/nova,hanlind/nova,cloudbase/nova,edulramirez/nova,noironetworks/nova,vmturbo/nova,tanglei528/nova,adelina-t/nova,jeffrey4l/nova,alexandrucoman/vbox-nova-driver,orbitfp7/nova,akash1808/nova,mmnelemane/nova,thomasem/nova,yosshy/nova,maelnor/nova,virtualopensystems/nova,sebrandon1/nova,hanlind/nova,silenceli/nova,angdraug/nova,felixma/nova,cernops/nova,JioCloud/nova,phenoxim/nova,BeyondTheClouds/nova,phenoxim/nova,zaina/nova,viggates/nova,LoHChina/nova,dims/nova,mahak/nova,projectcalico/calico-nova,Stavitsky/nova,badock/nova,devendermishrajio/nova,vmturbo/nova,takeshineshiro/nova,blueboxgroup/nova,MountainWei/nova,CCI-MOC/nova,rahulunair/nova,affo/nova,JioCloud/nova_test_latest,JioCloud/nova,berrange/nova,cyx1231st/nova