mod_realtimequiz: Replace 'view' and 'view all' add_to_log calls with events

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
mod_realtimequiz: Update user reports to use logging API

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
mod_realtimequiz: MDL-43040 Replace $module with $plugin in version.php

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
mod_realtimequiz: Bump version number and require Moodle 2.7 release

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
mod_realtimequiz: CONTRIB-5369 Add waittime setting and distribute client queries in time.
mod_realtimequiz: Add logging events for edit page and responses views

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
Fix incompatibility with Moodle 2.6 and below