base: do not enable check_duplicate_login_reference alarm by default

This alarm can be costly, no need to run it every day.

bt5/erp5_base/PathTemplateItem/portal_alarms/check_duplicate_login_reference.xml

@@ -18,7 +18,7 @@
         </item>
         <item>
             <key> <string>enabled</string> </key>
-            <value> <int>1</int> </value>
+            <value> <int>0</int> </value>
         </item>
         <item>
             <key> <string>id</string> </key>