servo_test: Fix lint error

This includes:
  - logging style
  - bad indention
  - unused import
  - unnecessary semicolon
  - redefined name

BUG=chromium-os:35902
TEST=Run FAFT suite and still work.

Change-Id: I7d50176f12b2815f53b0aba762f4b6243b706206
Reviewed-on: https://gerrit.chromium.org/gerrit/37520
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-by: Mike Truty <truty@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Commit-Ready: Vic Yang <victoryang@chromium.org>
Tested-by: Vic Yang <victoryang@chromium.org>
2 files changed