SCORM 2004 uses the element 'cmi.completion_status' to store the
completion status of a SCO, not 'cmi.core.lesson_status'.
This amends scorm_check_mode so that the right element is looked up.
When scorm_version_check returns false, SCORM 1.2 is assumed.
1. getMock()
2. setExpectedException()
3. checkForUnintentionallyCoveredCode renamed to beStrictAboutCoversAnnotation
4. beStrictAboutTestSize renamed to enforceTimeLimit
5. UnitTestCase class is now fully removed.