Add linking course feature
Fix the student module doesn't get events

The issue was the Filters are not executed when Blackboard calls a
module action. Spring security filters don't get called. Thus the oauth
request do not get token from token service. The workaround is
generating an ajax request, let client browser to do the
request (getEvents).
Add exception handling in controller and tests

Added HttpMessageNotReadableException handler in controllers and logging
the exceptions. Also added a test to test the
HttpMessageNotReadableException is thrown out when in correct REST
response.
Update version to 1.0.2