No longer allow test failures on Octave and MATLAB R2009b

All issues are now fixed, and we want to detect regressions early.
3 jobs for master in 1 minute and 9 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
passed testsuite_matlab #6490

00:00:43

passed testsuite_octave #6492

00:01:08

passed testsuite_old_matlab #6491

00:00:57