[DPP-56] GenProcess doesn't drain its mailbox properly

[qnikst]

[Imported from JIRA. Reported by Tim Watson [Administrator] @hyperthunk) as DPP-56 on 2013-01-14 22:06:57]
If you pass infoHandlers = [] then no info messages are consumed and the process' mailbox will just keep on growing. So a standard handler that applies the default policy is probably a good idea.

estimate: 10 mins

[hyperthunk]

Fixed in d78185e