jsonrpc: json over stomp available on the same socket

Changes required to have both supported protocols detected on the same
socket opened by vdsm.

Change-Id: Idc4eb04bf6115fafa4652453f26a771f389478a1
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/28508
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>