Merge pull request #13736 from edx/zoldak/fail-jenkins-report-build-on-error

Return with an error code from the coverage reporting bash script

scripts/jenkins-report.sh

 #!/usr/bin/env bash
+set -e
 
 # Note: this script is in a temporary state. In an effort to get the
 # platform off of coveralls and onto codecov, we will be temporarily