resolved the bug related to the address parsing

resolved the bug related to the address parsing

If user is enter the address for the unicast message,
we are parsing the input value in get_address_set() function.
I modified the get_address_set() function, because there are bugs
in this process. currently linux sample app code is not working.

Change-Id: Id0d0cfbabd2b91c4c18ec0ed28593495a2e2a75e
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2055
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>