INFO log level is to verbose

[sjmonson]

The INFO log level is way to verbose about the inner config of objects. We should push many of the messages to higher log levels and/or rewrite some messages to be less verbose.

Here is a proposal for what we could focus on in each log level:

• ERROR: Anything that leads to complete failure of the test
• WARNING: Things might be going wrong, or not happening in the expected way
  • Requests erroring
  • Concurrency saturated
• INFO: Things that should be happening that help explain the state
  • Info about run configuration, dataset...
  • What RPS settings are calculated in the sweep
  • Infrequent status updates
  • Info about output calculations / files that its dumped to
• DEBUG: Stuff like prompts and results
• TRACE: token-level events from the requests