SSM: Remove IN/OUT macros

SSM: Remove IN/OUT macros

They are not part of the coding standard for IoTivity, so they shouldn't
be there. The names are too generic, so there's a good chance of
conflicts too.

Change-Id: I27eaacb532114dd188c4ffff13d3d39cc37770da
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/695
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Tested-by: Jee Hyeok Kim <jihyeok13.kim@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>