Clemens Buchacher authored Feb 24, 2017 and Raffi Enficiaud committed Apr 09, 2018

If runtests('$unittest_file') throws an exception it is ignored. It is
easy to produce such an exception by passing a nonexistent file as
UNITTEST_FILE.

We already handle exceptions if the option NO_UNITTEST_FRAMEWORK is set.
Use the same method to handle exceptions thrown by runtests or by a
custom_Matlab_test_command.

Fixes #16660.