[PSR] Update of AE script

[Jaroslav Klapálek]

Dear students,

   evaluation script for the second assignment of PSR was updated:

 - moved a part of test #5 to test #4 to make it a little bit more clear
for you on why the test was failing,
 - added hints for test #7,
 - added test #8 as some students shared the same (wrong) behaviour in
their code, which wasn't covered by any test.


All uploads were re-evaluated, so check your AE result as it was updated.


Sincerely,

Jaroslav Klapálek