[F20] Removing lsb-utils, and python3 from usr/bin

Also, adding a symlink to test_that

BUG=b:188712077
TEST=test_that inside container.

Change-Id: I7e34f6f8910c815cfe937448ccfa51fd43180022
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2983645
Tested-by: Derek Beckett <dbeckett@chromium.org>
Auto-Submit: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
1 file changed