* Add a new way to extend the BigBlueButtonBN form via subplugins
* Allow subplugins to extends information via new tables and use it in
the edit form.
* Add a new cache helping with potential perfomance issues introduced
by recurring calls to find out about associated tables in subplugins.
* Provide a way for external participants to be invited to a meeting by giving them an url/password
for external users (not registered in Moodle)
* Add guest access page with username and password prompt
* Add form and modify API calls to take into account guest login
* Add a form modal to add guest users emails
* Allow copy of link and password in both popup form and module form
* The guest should be approved by default. It should be intentional to let them
in without checks.
* Guest access URL and password should not be copied when duplicating or backing
up the activity.
* The mod_bigbluebuttonbn_meeting_info web service function now
returns guestjoinurl and guestpassword only for moderators.
* Redirect if user already logged in
Note: this will allow guest to connect to an existing and running meeting. The moderator will then
be able to adjust the guest user's right. For security reasons we do not yet allow moderators
to join the meeting directly (or start a meeting)
* BBB has specific completion indicator that need to be taken into account
* Fix mock requests so we can send participant id and then attach events to them
* Refactor slightly the broker to split meeting logic from request (decoding)
* Fix update completion state cron
* Remove the setting "lock on join" and related settings
* Hard-code the lockSettingsLockOnJoin=true parameter on create when any of the lock settings is used.
* The lock settings from the instance were not sent to the BBB API
* The global settings related to lock settings did not show
* lockSettingLockOnJoinConfigurable is not working so removed for now
* Fixed lockSettingsLockOnJoin setting
* As 'Send content change notification' is standard in all activities in Moodle 4.0
we should be removing 'Notify this change to users enrolled'
* Fix and adjust tests
* The hide recording is working in combination with several settings and should
allow the Record button to be hidden either globally on in a given activity
* Participant roles could not be updated to moderator and always defaults to viewer
* Remove additional DB query in form to retrieve the current module information
Laurent David