change from octave to matlab

.artenolis.yml

-image: schickling/octave
-
 language: bash
 
 before_install:
@@ -7,5 +5,5 @@ before_install:
 
 script:
     # launch the tests
-    - octave test/*.m
+    - /mnt/prince-data/MATLAB/$MATLAB_VER/bin/./matlab -nodesktop -nosplash < test/*.m