Prepare the LaTeX to produce MathML by fmath converter, better
extraction of oMath to inline the equation in Word, fix a rare case of
single choice not being outputed

Remove the default passed value (false) if the cut value is not choosed
as mode to calculate passed / failed. Finer default correction mode in
course element after chossing a test (grader if grading enabled, manual
if test has manual by coach defined...)

Merge branch 'OpenOLAT_15.0' of ssh://srosse@office.frentix.com/home/srosse/repositories/OpenOLAT.git into OpenOLAT_15.0

A report with the list of courses and tests with the questions used in
the tests, their master reference inclusive ownership of tests,
questions and master questions.