MDL-39961 Events: Added user_updated event, replacing old event
MDL-39961 Events: Added user_created event, replacing old event
MDL-39961 Events: Added user_deleted event, replacing old event
MDL-39961 Events: Added user_loggedout event, replacing old event
MDL-39961 Events: Added user_enrolment_created event, replacing old event
MDL-39961 Events: Added user_enrolment_deleted event, replacing old event
MDL-39961 Events: Added user_enrolment_updated event, replacing old event