Release based on Bazel 0.9.0 version

v0.9.0: digest: sha256:b92ffa1ad544c11bcac8447bc0b5e92b629426501a9e810dcbea6f435581589b size: 1784

To pull this release, issue:

  $ docker pull davido42/bazel-build-gerrit:v0.9.0