no easy way to tell the different kinds of messages apart

[davidcarltonsumo]

I'm trying to generate a report on the failure rate for jobs, so to that end I care about the messages from modules but not, say, the queue information. (Though I might want a separate report that only cares about the queue information!) And, as far as I can tell, there's no good way to pick out only the messages that I want - I can try searching on start_time, since that attribute is present in BuildModel but not in the other models and since it's unlikely to show up as a data value for an attribute in another model, but it would be nice if I had a json field message_type or something that I could search on to pick the exact messages I want.

[lchodar]

Fixed with recent refactoring. Can specify _sourceCategory for different message types in jenkins configuration.