message: Updating testing documentation
  docker run requires to specify the scenario. I'm not sure about the other Prow configuration items, but the first one seems to have moved.
diff: @@ -23,7 +23,8 @@ make buildv2
  And then run the tests.
  ```shell
  -docker run --rm gcr.io/minigo-testing/minigo-prow-harness-v2:latest --repo=github.com/tensorflow/minigo --job=tf-minigo-presubmit
  +docker run --rm gcr.io/minigo-testing/minigo-prow-harness-v2:latest \
  + --repo=github.com/tensorflow/minigo --job=tf-minigo-presubmit --scenario=execute -- ./test.sh
  ```
  ## Components
  @@ -42,7 +43,7 @@ docker run --rm gcr.io/minigo-testing/minigo-prow-harness-v2:latest --repo=githu
  Minigo has some configuration directly in Prow to make all this jazz work:
  - **Test configuration**. This configures the specific test-suites that are run on prow
  - https://github.com/kubernetes/test-infra/blob/master/prow/config.yaml
  + https://github.com/kubernetes/test-infra/blob/master/config/jobs/tensorflow/minigo/minigo.yaml
  - **Test UI Configuration**: What shows up in testgrid, the Prow test-ui?
  https://github.com/kubernetes/test-infra/blob/master/testgrid/config.yaml
  