Add logic for extra Information.

Add logic for extra Information.

This patch include,
1. Add extraInfo field in NSMessage.
2. Modify logic for related sendMessage.

second patch include,
modify setting Message payload.

third and fourth patch include,
add defence code for double free.

Change-Id: I2dcfaa9cf9bc0e42b1c0aaff83de99819433f01e
Signed-off-by: jaesick.shin <jaesick.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/11975
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
(cherry picked from commit 4ef1e3f85db4980d9e4d316c98bef3f2ac67c8e3)
Reviewed-on: https://gerrit.iotivity.org/gerrit/12449