MATLAB Tests are not running

[Jiya-Rathi]

Describe the bug
There are 3 bugs in the MATLAB/Octave build:

1. CmakLists.txt in tests/matlab_octave needs to have addpath('${CMAKE_SOURCE_DIR}/src/matlab_octave'); in order for make run_matlab_octave_tests to run.
2. Once the tests are running testPoissonAccuracy.m is failing with an error for the 8th order case. As shown in the image below:

3. Why is the build system not catching this error on GitHub?

To Reproduce
Steps to reproduce the behavior:

1. Build mole
2. make run_matlab_octave_tests
3. And the error will be visible

Expected behavior
testPoissonAccuracy.m fails

Desktop (please complete the following information):

• OS: Linux
  running this on Mantis.sdsu.edu