testDynamicClassGeneration: clean up objects created by testERP5Broken

This was breaking the next test.

product/ERP5Type/tests/testDynamicClassGeneration.py

@@ -2251,10 +2251,12 @@ class Test(ERP5TypeTestCase):
     # Create a broken ghost object
     import erp5.portal_type
     name = self._testMethodName
-    ptype = self.portal.portal_types.newContent(name, type_class="File")
+    types_tool = self.portal.portal_types
+    ptype = types_tool.newContent(name, type_class="File")
     file = ptype.constructInstance(self.portal, name, data="foo")
     self.assertEqual(file.size, 3)
     self.commit()
+    try:
       self.portal._p_jar.cacheMinimize()
       del file
       delattr(erp5.portal_type, name)
@@ -2266,6 +2268,10 @@ class Test(ERP5TypeTestCase):
       self.assertRaises(BrokenModified, setattr, file, "size", 0)
       self.assertTrue(isinstance(file, ERP5BaseBroken))
       self.assertEqual(file.size, 3)
+    finally:
+      self.portal._delObject(name)
+      types_tool._delObject(name)
+      self.commit()
 
 def test_suite():
   suite = unittest.TestSuite()