Ocatave test wrapper

• write a wrapper script in octave that checks the int of failed tests and uses this as exit code if tests fail

https://octave.sourceforge.io/octave/function/quit.html

• write a bash script that searches and calls all wrapper scripts similar to

https://collaborating.tuhh.de/cfg0846/mathimproc2021-sol/-/blob/master/testSuite.sh