fix files unit test

Author: mmyrte

climada/util/test/test_files.py

@@ -91,6 +91,7 @@ def test_globbing(self):
         tmp_files = [file_name + f for f in tmp_files]
         tmp_files = [f for f in tmp_files if not os.path.isdir(f) 
                 and not f.startswith('.')]
+        tmp_files = sorted(tmp_files)
         self.assertEqual(tmp_files, out)
 
 # Execute Tests