Remove retries in changes validation

When validating incoming changes, fail the build at
the first failure so that flaky changes won't get a positive
verified label.

Change-Id: I769ac564d796f8bdd61cae4f48f19ea75e541bfa
1 file changed
tree: 923aee9d70d8e94c9c34c6136493b1b560a65b40
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore