[autotest] Add logging and stats in dynmaic suite and provisioning

Add logging/stats to suite:find_and_parse_tests,
dev_server:stage_artificats, and provision_AutoUpdate.py

BUG=chromium:404202
TEST=run suite.

Change-Id: I99414651b75c828f5d2ae6b3531c85845a3f91db
Reviewed-on: https://chromium-review.googlesource.com/212727
Reviewed-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Fang Deng <fdeng@chromium.org>
Tested-by: Fang Deng <fdeng@chromium.org>
4 files changed