testTemplateTool: support python < 2.7.9 when patching ssl to accept certificate

This is fuxip for 1038d441

product/ERP5/tests/testTemplateTool.py

@@ -44,8 +44,10 @@ from Products.ERP5Type.tests.ERP5TypeTestCase import ERP5TypeTestCase
 
 # Specify svn.erp5.org certificate file.
 import ssl
-_create_default_https_context_orig = ssl._create_default_https_context
-def _create_default_https_context(purpose=ssl.Purpose.SERVER_AUTH, cafile=None,
+if hasattr(ssl, '_create_default_https_context'):
+  # On python >= 2.7.9 we patch ssl module to accept our svn.erp5.org certificate
+  _create_default_https_context_orig = ssl._create_default_https_context
+  def _create_default_https_context(purpose=ssl.Purpose.SERVER_AUTH, cafile=None,
                              capath=None, cadata=None):
     return _create_default_https_context_orig(
       purpose,
@@ -53,7 +55,7 @@ def _create_default_https_context(purpose=ssl.Purpose.SERVER_AUTH, cafile=None,
       capath=capath,
       cadata=cadata,
     )
-ssl._create_default_https_context = _create_default_https_context
+  ssl._create_default_https_context = _create_default_https_context
 
 class TestTemplateTool(ERP5TypeTestCase):
   """Test the template tool