qemu: hotplug: Implement removable media change for -blockdev
qemu: hotplug: Implement removable media change for -blockdev

Use the new APIs which allow to manipulate the tray and media separately
and also allow using a nodename to refer to a media to implement media
changing.

With the new approach we don't have to call eject twice as the media is
removed by calling qemuMonitorBlockdevMediumRemove.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

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