Protect against during indexation concurrency.

As users can double click (or register in same time with same reference)
during time of indexation, it is required to lock on activity system.

Note that as reference is global in the system, same tag, as in
Document.Person._setReference is used.

bt5/erp5_credential/SkinTemplateItem/portal_skins/erp5_credential/CredentialRequest_checkLoginAvailability.xml

@@ -57,6 +57,13 @@ Parameters:\n
 value -- field value (string)\n
 REQUEST -- standard REQUEST variable"""\n
 \n
+if value:\n
+  # Same tag is used as in Document.Person._setReference, in order to protect against\n
+  # concurrency between Credential Request and Person object too\n
+  tag = \'Person_setReference_%s\' % value.encode(\'hex\')\n
+  if context.getPortalObject().portal_activities.countMessageWithTag(tag):\n
+    return False\n
+\n
 def getRealContext():\n
   if not REQUEST:\n
     return context\n

bt5/erp5_credential/SkinTemplateItem/portal_skins/erp5_credential/ERP5Site_newCredentialRequest.xml

@@ -90,6 +90,9 @@ credential_request = module.newContent(\n
                 date_of_birth=date_of_birth)\n
 \n
 credential_request.setCategoryList(category_list)\n
+# Same tag is used as in Document.Person._setReference, in order to protect against\n
+# concurrency between Credential Request and Person object too\n
+credential_request.reindexObject(activate_kw=dict(tag=\'Person_setReference_%s\' % reference.encode(\'hex\')))\n
 \n
 #We attach the current user to the credential request if not anonymous\n
 if not context.portal_membership.isAnonymousUser():\n

bt5/erp5_credential/bt/revision

-364
\ No newline at end of file
+365
\ No newline at end of file