stomp: Server side heartbeat implementation

Change-Id: I72e1af2e7ddf8d9b461163f0ef315677c1bb97d4
Signed-off-by: Saggi Mizrahi <smizrahi@redhat.com>
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/30596