Fix the e2e K8s test (#1842)

* Debugging the integration testing.

It seems to be consistently failing (also fix a typo in the file/leg name).

I'm disabling `-v` for `go test` because it interleaves the test output in ways that make it painful to read a single failing test's output when `t.Parallel` is involved.

* Try swapping registry:2 for the registry add-on

* Drop logf and make Logger private

scripts/travis-setup.sh

@@ -20,7 +20,6 @@ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubun
 sudo apt-get update
 sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
 curl -LO https://storage.googleapis.com/container-diff/latest/container-diff-linux-amd64 && chmod +x container-diff-linux-amd64 && sudo mv container-diff-linux-amd64 /usr/local/bin/container-diff
-docker run -d -p 5000:5000 --restart always --name registry registry:2
 
 mkdir -p $HOME/.docker/
 echo '{}' > $HOME/.docker/config.json