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/time_value.h

@@ -48,6 +48,8 @@ bool Time_Value_Object_Name(
     uint32_t object_instance, BACNET_CHARACTER_STRING *object_name);
 BACNET_STACK_EXPORT
 bool Time_Value_Name_Set(uint32_t object_instance, char *new_name);
+BACNET_STACK_EXPORT
+const char *Time_Value_Name_ASCII(uint32_t object_instance);
 
 BACNET_STACK_EXPORT
 int Time_Value_Read_Property(BACNET_READ_PROPERTY_DATA *rpdata);