jsonrpc: hotunplug spelling issue


Bug-Url: https://bugzilla.redhat.com/1147458
Change-Id: Ic95a94da36ca3a6dc005c8cf0cd705b4cf87b81a
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/33532
Reviewed-by: Dan Kenigsberg <danken@redhat.com>