Bugfix/lighting output dimming refactor (#855)

* Refactored lighting command operations from the lighting output object, and added unit testing. Integrated the result back into lighting-output object.

test/bacnet/basic/object/device/CMakeLists.txt

@@ -83,14 +83,15 @@ add_executable(${PROJECT_NAME}
     ${SRC_DIR}/bacnet/basic/service/h_cov.c
     ${SRC_DIR}/bacnet/basic/service/h_wp.c
     ${SRC_DIR}/bacnet/basic/sys/bigend.c
+    ${SRC_DIR}/bacnet/basic/sys/days.c
     ${SRC_DIR}/bacnet/basic/sys/debug.c
     ${SRC_DIR}/bacnet/basic/sys/keylist.c
+    ${SRC_DIR}/bacnet/basic/sys/lighting_command.c
     ${SRC_DIR}/bacnet/basic/sys/linear.c
     ${SRC_DIR}/bacnet/basic/tsm/tsm.c
     ${SRC_DIR}/bacnet/datalink/bvlc.c
     ${SRC_DIR}/bacnet/cov.c
     ${SRC_DIR}/bacnet/datetime.c
-    ${SRC_DIR}/bacnet/basic/sys/days.c
     ${SRC_DIR}/bacnet/dcc.c
     ${SRC_DIR}/bacnet/indtext.c
     ${SRC_DIR}/bacnet/hostnport.c