Introduce qemuDomainNamespaceUnlinkPath
Introduce qemuDomainNamespaceUnlinkPath

Use it in every qemuDomainNamespaceTeardown* function that only
wants to unlink one device.

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