domain_event: s/MetadataCange/MetadataChange/g
domain_event: s/MetadataCange/MetadataChange/g

There's a typo in struct name.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,zippy2/libvirt,jardasgit/libvirt,libvirt/libvirt,zippy2/libvirt,olafhering/libvirt,eskultety/libvirt,jardasgit/libvirt,crobinso/libvirt,crobinso/libvirt,nertpinx/libvirt,zippy2/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,eskultety/libvirt,fabianfreyer/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,olafhering/libvirt,libvirt/libvirt,andreabolognani/libvirt,jardasgit/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,eskultety/libvirt,crobinso/libvirt,andreabolognani/libvirt,jardasgit/libvirt,jfehlig/libvirt,eskultety/libvirt,libvirt/libvirt,andreabolognani/libvirt,olafhering/libvirt,nertpinx/libvirt,eskultety/libvirt