Cut back log verbosity in gs_offloader.

Previously, gs_offloader made a point to log the disposition of
every job directory on every offload cycle.  That turned out to be
too noisy.  This reduces the logging to a handful of summary lines
once per cycle.

BUG=chromium:376069
TEST=run unit tests

Change-Id: I2abe127d8568225ad5b8f1082b15a122297fdb40
Reviewed-on: https://chromium-review.googlesource.com/205237
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
3 files changed