Remove unittest-specific callbacks for checking access and displaying
the calendar events on the dashboard.
This will allow plugin developers unittest the full behavior
of how their plugins add events to the dashboard.
Reset all static caches between unittests.
If there are multiple, non-repeating events with the same module name,
instance and event type. The most specific event or the event with the
highest priority will be shown.
The ordering of event priorities:
User override events > Group override events > Course events.
If there are no user override events and there are multiple group
overrides for an event, then the one with the highest priority will be
shown.
1. getMock()
2. setExpectedException()
3. checkForUnintentionallyCoveredCode renamed to beStrictAboutCoversAnnotation
4. beStrictAboutTestSize renamed to enforceTimeLimit
5. UnitTestCase class is now fully removed.
