build: Extend unit_tests to all (including service)

build: Extend unit_tests to all (including service)

Bug: https://jira.iotivity.org/browse/IOT-1486
Change-Id: I89426d04e0b05c49470c059ffe60cf90fcb95582
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14971
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>
Reviewed-by: Mats Wichmann <mats@osg.samsung.com>
Reviewed-by: George Nash <george.nash@intel.com>
Origin: https://gerrit.iotivity.org/gerrit/#/c/15291/
Reviewed-on: https://gerrit.iotivity.org/gerrit/15291
Reviewed-by: Habib Virji <habib.virji@samsung.com>