slapos_jio_ui_test: Add utility script to restore MailHost to original

When you run tests, MailHost is normally changed to DummyMailHost, this script helps you to restore, in case you want to configure your development instance as a demo site.

master/bt5/slapos_jio_ui_test/ExtensionTemplateItem/portal_components/extension.erp5.SlapOSUiTest.py

+from ExtensionClass import pmc_init_of
+from Products.ERP5Type.tests.utils import DummyMailHostMixin
+
 from AccessControl.SecurityManagement import getSecurityManager
 from AccessControl.SecurityManagement import setSecurityManager
 from AccessControl.SecurityManagement import newSecurityManager
@@ -93,4 +96,18 @@ def Computer_simulateSlapgridFormat(self, partition_count=10):
     return portal.portal_slap.loadComputerConfigurationFromXML(
         xml_marshaller.xml_marshaller.dumps(computer_dict))
   finally:
-    setSecurityManager(sm)
\ No newline at end of file
+    setSecurityManager(sm)
+
+
+def restoreDummyMailHost(self):
+  """Restore the replacement of Original Mail Host by Dummy Mail Host.
+
+    Copied & pasted from ERP5TypeTestCaseMixin._restoreMailHost
+  """
+  mailhost = self.getPortalObject().MailHost
+  cls = mailhost.__class__
+  if cls.__bases__[0] is DummyMailHostMixin:
+    cls.__bases__ = cls.__bases__[1:]
+  pmc_init_of(cls)
+
+  return True

master/bt5/slapos_jio_ui_test/SkinTemplateItem/portal_skins/slapos_ui_test/ERP5Site_restoreDummyMailHost.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="ExternalMethod" module="Products.ExternalMethod.ExternalMethod"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_function</string> </key>
+            <value> <string>restoreDummyMailHost</string> </value>
+        </item>
+        <item>
+            <key> <string>_module</string> </key>
+            <value> <string>SlapOSUiTest</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>ERP5Site_restoreDummyMailHost</string> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string></string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>