restapi: Expose Vm#runInPaused property

Added new element to VM and Template schema:

<start_paused>
  true|false
</start_paused>

Change-Id: I142adaa9929e3fc8d67311ff7610a9f4557666ff
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1116550
Signed-off-by: Martin Betak <mbetak@redhat.com>