Instrument fetch_batch for each_message

[michaelsauter]

Okay, this is a start. Not sure if this is the best place to do this. Also, I did not add the same instrumentation for each_batch as it would just duplicate start_process_batch.consumer. However, for consistency it might make sense to add it?

Let me know what you think and I'll adapt as necessary.

[michaelsauter]

Hmm, tests failed but it looks unrelated. I ran spec/consumer_spec.rb locally and it passed.

[dasch]

Thanks!