As a user, I want to see my registered classes in my calendar
## STEP 1
- I go to OpenPaas website
- I logged in
- I open the module list
- I click on calendar 'icon'
- I can see my calendar 'class from moodle'
- I can see event related to the classes
In calendar module everything is made to add new calendar from external provider.
After user as linked his account #1 :
- Add a new calendar named provided from moodle
- Register the provider from moodle in order to fetch the events and show them in the calendar