Integrated single/multi thread for interface controller and connectivity manager.

Integrated single/multi thread for interface controller and connectivity manager.

Merged serperated files by using #SINGLE_THREAD and #MULTI_THREAD flags.

Signed-off-by: jw1103.kim <jw1103.kim@samsung.com>
Signed-off-by: Ashok Channa <ashok.channa@samsung.com>
Change-Id: I2d7b38d86226bdfc03c7a7b12626c2c4459ad305
Signed-off-by: jw1103.kim <jw1103.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/783
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>