MDL-39959 events: Add unit tests for event course_module_created
MDL-39959 events: Add event course_module_created
MDL-39959 events: Add event course_module_updated
MDL-39959 events: Add unit tests for event course_module_updated
MDL-39959 events: Add event course_module_deleted
MDL-39959 events: Add unit tests for event course_module_deleted