Completion extension using Subplugins

    Manual test (completion)   Preparation:  * Go to the Admin / BigBlueButton BN global settings and enable bigbluebuttonbn_meetingevents_enabled   Test:  * Create a new BBB activity B1  * Enable custom completion settings by selecting "Show activity as complete when conditions are met" in the Completion tracking parameter  * Select Chats in the Require participation group  * Save  * Ensure that the To do: Participate in 1 chat(s) is displayed.  * Go back to the activity settings  * Ensure that "Chats" in the Require participation group is checked     Manual test (completion with plugin)   Preparation:  * As above enable bigbluebuttonbn_meetingevents_enabled  * Install the subplugin https://github.com/call-learning/moodle-bbbext_sample in the mod/bigbluebuttonbn/extension folder (make sure to rename the subplugin to sample)  * Run the install/update process   Test:  * Create a new BBB activity B1  * Enable custom completion settings by selecting "Show activity as complete when conditions are met" in the Completion tracking parameter  * Select "Raise hand twice in a meeting"  * Save  * Ensure that the To do: Raise hand twice in a meeting..  * Go back to the activity settings  * Ensure that Raise hand twice in a meeting is checked   Disabling the plugin: Disable the plugin by going to "Manage BigBlueButton extension plugins" in the global BigblueButton setting page Go the a previously created activity B1 Ensure that Raise hand twice in a meeting does not appear in the setting