cmd/bent: initial round of testing import and cleanup

Fix Kanzi benchmark description to exclude failing benchmark.

Docker now prints helpful stuff after the container ID,
parse that more carefully.

Found a few small errors.

Corrected README download instructions.

Corrected a return code to be 0 for success.

Change-Id: Ife0199e4ec01d4f936072efe4df28d8d371c52e6
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/320969
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
4 files changed