on one way messages, if application ask to receive read receipt,
   it should use on_message_delivered notification.
if application ask to know when it is safe to recycle its out messages, it should use
on_ow_msg_send_complete notification.

Change-Id: I8e4cbde7f4e9aa3d2768e1d8b43b3f00ae54d5c7
Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
rework on message_write function in test applications

Change-Id: I416413fc08ea28f1c0dc596c2300a0ce0f507698
Signed-off-by: Eyal Salomon <esalomon@mellanox.com>