CTest is not capturing pass/fail status process exit codes from the Matlab runtests() function

[cpaolini]

@jbrzensk Yes, In tests/matlab_octave/CMakeLists.txt I need to change

add_test(
        NAME ${TEST_NAME}
        COMMAND matlab -batch "addpath('${CMAKE_CURRENT_SOURCE_DIR}');
        runtests('${TEST_NAME}')"

to

add_test(
        NAME ${TEST_NAME}
        COMMAND matlab -batch "addpath('${CMAKE_CURRENT_SOURCE_DIR}');
        results = runtests('${TEST_NAME}');
        assertSuccess(results);"

I'll make a PR for this change.

Originally posted by @cpaolini in #321