[Test] Make deprecation warnings fatal for all ways of running tests

Since tests like test_composite.TestModels.test_load_thermo_models rely on
deprecation warnings being fatal, we need to make sure that this setting is
always enabled. Previously, running the tests using "python -m unittest" instead
of the runCythonTests.py script did not do this.

Fixes Cantera#802

interfaces/cython/cantera/test/utilities.py

@@ -32,6 +32,7 @@ def setUpClass(cls):
         else:
             cls.test_work_dir = tempfile.mkdtemp()
 
+        cantera.make_deprecation_warnings_fatal()
         cantera.add_directory(cls.test_work_dir)
         cls.test_data_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), 'data'))
         cls.cantera_data = os.path.abspath(os.path.join(

test/python/runCythonTests.py

@@ -36,8 +36,6 @@
 import cantera
 import cantera.test
 
-cantera.make_deprecation_warnings_fatal()
-
 class TestResult(unittest.TextTestResult):
     def __init__(self, *args, **kwargs):
         unittest.TextTestResult.__init__(self, *args, **kwargs)