qemuDomainRemoveDevice: add qemuDomainRemoveWatchdog
qemuDomainRemoveDevice: add qemuDomainRemoveWatchdog

qemuDomainDetachWatchdog uses the infrastructure for waiting
for the DEVICE_DELETED event, but the asynchronous delete
was not implemented.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

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