Removed OCGetInterfaceAddress

Removed OCGetInterfaceAddress

Removed obsolete OCGetInterfaceAddress and
cleaned up C Samples.

Note: OCSocket will eventually be completely removed
but not in this commit (due to dependencies)

Change-Id: Ie5af18518102be8595973fd1ff1d7dc4fdfd4007
Signed-off-by: Yuliya Kamatkova <yuliya.kamatkova@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/319
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-by: Sakthivel Samidurai <sakthivel.samidurai@intel.com>
Reviewed-by: Sashi Penta <sashi.kumar.penta@intel.com>