Made the test cleanup more robust by cleaning up any non-existent

directories found in Products.__path__.

lib/python/OFS/tests/testAppInitializer.py

@@ -75,7 +75,8 @@ class TestInitialization( unittest.TestCase ):
         os.rmdir(TEMPPRODUCTS)
         os.rmdir(TEMPNAME)
         import Products
-        Products.__path__ = [d for d in Products.__path__ if d != TEMPPRODUCTS]
+        Products.__path__ = [d for d in Products.__path__
+                             if os.path.exists(d)]
 
     def configure(self, text):
         # We have to create a directory of our own since the existence