virdbus: Show method name in error message
virdbus: Show method name in error message

If you trigger bug 1033369, we get the error message:

  error from service: Invalid argument

Which is a bit too generic to pinpoint what is actually failing. This
changes it to:

  error from service: CreateMachine: Invalid argument

Acked-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

nertpinx/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,olafhering/libvirt,jardasgit/libvirt,rlaager/libvirt,zippy2/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,rlaager/libvirt,taget/libvirt,libvirt/libvirt,elmarco/libvirt,datto/libvirt,crobinso/libvirt,jardasgit/libvirt,rlaager/libvirt,libvirt/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,eskultety/libvirt,agx/libvirt,shugaoye/libvirt,libvirt/libvirt,rlaager/libvirt,taget/libvirt,libvirt/libvirt,andreabolognani/libvirt,jfehlig/libvirt,eskultety/libvirt,elmarco/libvirt,olafhering/libvirt,andreabolognani/libvirt,zippy2/libvirt,eskultety/libvirt,jfehlig/libvirt,crobinso/libvirt,jfehlig/libvirt,eskultety/libvirt,nertpinx/libvirt,eskultety/libvirt,crobinso/libvirt,agx/libvirt,agx/libvirt,agx/libvirt,agx/libvirt,elmarco/libvirt,crobinso/libvirt,datto/libvirt,shugaoye/libvirt,andreabolognani/libvirt,jfehlig/libvirt,datto/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,olafhering/libvirt,elmarco/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,elmarco/libvirt,nertpinx/libvirt,taget/libvirt,datto/libvirt,rlaager/libvirt,taget/libvirt,zippy2/libvirt,shugaoye/libvirt,taget/libvirt,VenkatDatta/libvirt,datto/libvirt,jardasgit/libvirt,olafhering/libvirt,andreabolognani/libvirt,zippy2/libvirt,jardasgit/libvirt,andreabolognani/libvirt