silence a warning: use portal_caches.clearCache instead of global clearCache()

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42788 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/testERP5Type.py

@@ -463,7 +463,7 @@ class TestERP5Type(PropertySheetTestCase, LogInterceptor):
       def _cache():
         return cached_var
       
-      from Products.ERP5Type.Cache import CachingMethod, clearCache
+      from Products.ERP5Type.Cache import CachingMethod
       cache = CachingMethod(_cache, id='testing_cache')
       
       self.assertEquals(cache(), cached_var)
@@ -473,7 +473,7 @@ class TestERP5Type(PropertySheetTestCase, LogInterceptor):
       # cache hit -> still the old variable
       self.assertEquals(cache(), cached_var_orig)
         
-      clearCache()
+      self.portal.portal_caches.clearCache()
       self.assertEquals(cache(), cached_var)
 
     def test_07_afterCloneScript(self):