test order fix

Summary: A dummy value in test_opengl_utils seems to be able to break tests in test_mesh_renderer_opengl{,_to}.

Reviewed By: kjchalup

Differential Revision: D39173275

fbshipit-source-id: 83b15159f70135ea575d5085c7b6b37badd6e49e

Author: bottler

tests/test_opengl_utils.py

@@ -322,6 +322,10 @@ def test_render_multi_thread_multi_gpu(self):
 
 
 class TestOpenGLUtils(TestCaseMixin, unittest.TestCase):
+    @classmethod
+    def tearDownClass(cls):
+        global_device_context_store.set_context_data(torch.device("cuda:0"), None)
+
     def test_device_context_store(self):
         # Most of DCS's functionality is tested in the tests above, test the remainder.
         device = torch.device("cuda:0")