[FIX] help_online: avoid removal of exported pages

Always use the '__export__' prefix when generating the xmlid of pages exported by the export wizard to avoid autmomatic removal of these pages by Odoo on system update (-u)

help_online/tests/test_export_help_wizard.py

@@ -27,7 +27,7 @@ class TestExportHelpWizard(TestWizardCommon):
         parser = ET.XMLParser(remove_blank_text=True)
         rootXml = ET.XML(xmlData, parser=parser)
 
-        xPath = ".//template[@id='website.%s']" % self.pageName
+        xPath = ".//template[@id='__export__.%s']" % self.pageName
         templateNodeList = rootXml.findall(xPath)
         self.assertEqual(len(templateNodeList), 1)
         self.assertNotIn("website.", templateNodeList[0].attrib['name'])
@@ -47,7 +47,7 @@ class TestExportHelpWizard(TestWizardCommon):
                     self.assertIn("/web/image/%s" % self.imgXmlId, imgSrc)
 
         if self.pageTemplate:
-            xPath = ".//template[@id='website.%s_snippet']" % self.pageName
+            xPath = ".//template[@id='__export__.%s_snippet']" % self.pageName
             templateNodeList = rootXml.findall(xPath)
             self.assertEqual(len(templateNodeList), 1)
             self.assertNotIn("website.", templateNodeList[0].attrib['name'])

help_online/wizards/export_help_wizard.py

@@ -271,6 +271,10 @@ class ExportHelpWizard(models.TransientModel):
                 return data[0].name
         else:
             module, name = template_name.split('.')
+            # always use __export__  as module by convention to
+            # avoid the removal by odoo of the exported pages on system
+            # update (-u )
+            module = "__export__"
             postfix = ir_model_data.search_count(
                 [('module', '=', module),
                  ('name', 'like', name)])