Feedback message shows '{0}' when ChannelManagerEventListener is thrown

Steps to reproduce the problem:

• Create ChannelManagerEventListener that throws ChannelManagerEventListenerException with a message and status STOP_CHANNEL_PROCESSING
• Config the event listener
  http://www.onehippo.org/library/concepts/channels/channelmanagereventlistener.html
• Create new Channel in the channel manager

Expected Output:
Feedback message where the

{0} is resolved

Actual Output:
Het aanmaken of bijwerken van het channel is gestopt door een listener : '{0}

'.