Fix a bogus warning when parsing <hostdev>
Fix a bogus warning when parsing <hostdev>

When parsing hostdev, the following message would be emitted:

10:17:19.052: error : virDomainHostdevDefParseXML:3748 : internal error unknown node alias

However, alias is appropriately parsed in
virDomainDeviceInfoParseXML anyway.  Disable the error message
in the initial XML parsing loop.

Signed-off-by: Chris Lalancette <60b62644009db6b194cc0445b64e9b27bb26433a@redhat.com>

usc-isi/libvirt,rbu/libvirt,wiedi/libvirt,elmarco/libvirt,wiedi/libvirt,eskultety/libvirt,dumbbell/libvirt,andreabolognani/libvirt,agx/libvirt,warewolf/libvirt,warewolf/libvirt,siboulet/libvirt-openvz,elmarco/libvirt,siboulet/libvirt-openvz,usc-isi/libvirt,novel/fbsd-libvirt,amery/libvirt-vserver,jeckersb/libvirt,taget/libvirt,trainstack/libvirt,VenkatDatta/libvirt,trainstack/libvirt,emaste/libvirt,nertpinx/libvirt,leilihh/libvirt,usc-isi/libvirt,datto/libvirt,danwent/libvirt-ovs,warewolf/libvirt,rlaager/libvirt,emaste/libvirt,cbosdo/libvirt,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,danwent/libvirt-ovs,fabianfreyer/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,VenkatDatta/libvirt,elmarco/libvirt,novel/fbsd-libvirt,amery/libvirt-vserver,bjzhang/libvirt,wiedi/libvirt,VenkatDatta/libvirt,emaste/libvirt,warewolf/libvirt,foomango/libvirt,rmarwaha/libvirt1,rbu/libvirt,datto/libvirt,usc-isi/libvirt,crobinso/libvirt,rlaager/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt1,cbosdo/libvirt,soulxu/libvirt-xuhj,elmarco/libvirt,fabianfreyer/libvirt,trainstack/libvirt,jfehlig/libvirt,jeckersb/libvirt,danwent/libvirt-ovs,kantai/libvirt-vfork,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,andreabolognani/libvirt,cbosdo/libvirt,siboulet/libvirt-openvz,wiedi/libvirt,rmarwaha/libvirt1,foomango/libvirt,rbu/libvirt,trainstack/libvirt,emaste/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,soulxu/libvirt-xuhj,leilihh/libvirt,trainstack/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,jardasgit/libvirt,bjzhang/libvirt,cbosdo/libvirt,usc-isi/libvirt,eskultety/libvirt,rmarwaha/libvirt,rmarwaha/libvirt1,wiedi/libvirt,jardasgit/libvirt,novel/fbsd-libvirt,VenkatDatta/libvirt,iam-TJ/libvirt,foomango/libvirt,soulxu/libvirt-xuhj,sshah-solarflare/Libvirt-PCI-passthrough-,olafhering/libvirt,amery/libvirt-vserver,olafhering/libvirt,siboulet/libvirt-openvz,emaste/libvirt,jeckersb/libvirt,andreabolognani/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,trainstack/libvirt,fabianfreyer/libvirt,rmarwaha/libvirt,jeckersb/libvirt,eskultety/libvirt,taget/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,jeckersb/libvirt,jardasgit/libvirt,amery/libvirt-vserver,taget/libvirt,rlaager/libvirt,emaste/libvirt,leilihh/libvirt,iam-TJ/libvirt,novel/fbsd-libvirt,rmarwaha/libvirt,leilihh/libvirt,shugaoye/libvirt,rmarwaha/libvirt,jfehlig/libvirt,kantai/libvirt-vfork,foomango/libvirt,novel/fbsd-libvirt,shugaoye/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,rlaager/libvirt,wiedi/libvirt,soulxu/libvirt-xuhj,libvirt/libvirt,bjzhang/libvirt,olafhering/libvirt,taget/libvirt,zippy2/libvirt,iam-TJ/libvirt,libvirt/libvirt,VenkatDatta/libvirt,crobinso/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,novel/fbsd-libvirt,jardasgit/libvirt,dumbbell/libvirt,taget/libvirt,kantai/libvirt-vfork,shugaoye/libvirt,warewolf/libvirt,foomango/libvirt,siboulet/libvirt-openvz,novel/fbsd-libvirt,rmarwaha/libvirt,elmarco/libvirt,shugaoye/libvirt,zippy2/libvirt,kantai/libvirt-vfork,jeckersb/libvirt,jfehlig/libvirt,libvirt/libvirt,dumbbell/libvirt,trainstack/libvirt,zhlcindy/libvirt-1.1.4-maintain,datto/libvirt,datto/libvirt,eskultety/libvirt,warewolf/libvirt,emaste/libvirt,bjzhang/libvirt,rmarwaha/libvirt,amery/libvirt-vserver,andreabolognani/libvirt,jeckersb/libvirt,dumbbell/libvirt,agx/libvirt,rbu/libvirt,soulxu/libvirt-xuhj,agx/libvirt,jfehlig/libvirt,rmarwaha/libvirt1,bjzhang/libvirt,datto/libvirt,crobinso/libvirt,danwent/libvirt-ovs,leilihh/libvirt,dumbbell/libvirt,nertpinx/libvirt,warewolf/libvirt,eskultety/libvirt,rlaager/libvirt,agx/libvirt,libvirt/libvirt,nertpinx/libvirt,kantai/libvirt-vfork,nertpinx/libvirt,crobinso/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,dumbbell/libvirt,wiedi/libvirt,nertpinx/libvirt,novel/fbsd-libvirt,agx/libvirt,leilihh/libvirt,andreabolognani/libvirt,jardasgit/libvirt,rbu/libvirt,olafhering/libvirt