puppetlabs/marionette-collective — pull request #220 by richardc (2014-07-31 15:58:19+00:00)
Title: MCO-418 Explain that we're ignoring the message

Currently if a message exceeds its TTL we raise MsgTTLExpired which is logged
at WARN and then don't process the message. Here we tweak the message a little
so that it's more apparent to the user that the message was rejected by
validation.