Test staging

Changes to gitlab-ci to be compatible with new staging approach.

matlab/tests_matlab.m

 function tests_matlab(test_case)
 % function to call tests from test_script.sh
 try
-   fprintf('\n Running test file: %s\n',mfilename('fullpath'));
-   fprintf('     Time: %s\n',datestr(now));
-   
-   passed = run_gdat_tests(test_case); % add a call to your test script here, with optional test_case input
+   if verLessThan('matlab','8.5.0') 
+    disp('gdat tests do not work for matlab version <8.5.0, skipping tests');
+    passed = true;
+   else
+    fprintf('\n Running test file: %s\n',mfilename('fullpath'));
+    fprintf('     Time: %s\n',datestr(now));
+    passed = run_gdat_tests(test_case); % add a call to your test script here, with optional test_case input
+   end 
    exit_code = int32(~passed); % convert to bash shell convention
 catch ME
    disp(getReport(ME))