MDL-40058 mod_wiki: Replaced add_to_log for admin to event
MDL-40058 mod_wiki: Replaced add_to_log for page map viewed to event
MDL-40058 mod_wiki: Replaced add_to_log for page created to event
MDL-40058 mod_wiki: Replaced add_to_log for page version viewed to event
MDL-40058 Events: Replaced add_to_log for page comments to event
MDL-40058 Events: added unit test
MDL-40058 mod_wiki: modified wiki_restore_page api to accept version and context