tests: skip_if_no_ssl decorator always returned None

tests/__init__.py

@@ -1,12 +1,12 @@
 # package is named tests, not test, so it won't be confused with test in stdlib
-import sys
-import os
 import errno
+import os
 import unittest
 import warnings
 
 from eventlet import debug, hubs
 
+
 # convenience for importers
 main = unittest.main
 
@@ -114,11 +114,13 @@ def skip_if_no_ssl(func):
     """ Decorator that skips a test if SSL is not available."""
     try:
         import eventlet.green.ssl
+        return func
     except ImportError:
         try:
             import eventlet.green.OpenSSL
+            return func
         except ImportError:
-            skipped(func)
+            return skipped(func)
 
 
 class TestIsTakingTooLong(Exception):