Abort the build if bazel was not installed

The installation of bazel may fail silently with exit code
zero, creating an inconsistent cached step in Docker.

By calling 'bazel version' after the installation, the problem
is workarounded because if bazel wasn't installed properly,
the bazel version command will fail.

Change-Id: I2fd7b079034baf09e9aca55a27e23da99d5e3867
1 file changed
tree: f11f707ca94bf2bfe96bdf934db5ca75dd09469a
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore