Added object-name c-string getter function to basic objects so they can be referenced to free if dynamically created. (#754)

* Added basic object-name get for ASCII names to enable free if they were dynamically created. Added unit testing to validate the basic object ASCII object-name API.

* Removed static scope on character array used for name since the array gets copied into characterstring array and static is not needed.

src/bacnet/basic/object/lo.h

@@ -100,6 +100,9 @@ extern "C" {
     bool Lighting_Output_Name_Set(
         uint32_t object_instance,
         char *new_name);
+    BACNET_STACK_EXPORT
+    const char *Lighting_Output_Name_ASCII(
+        uint32_t object_instance);
 
     BACNET_STACK_EXPORT
     char *Lighting_Output_Description(