[zanata/zanata-scripts] 53b8f0: Use checkout, env.JENKINS_HOME

[GitHub]

  Branch: refs/heads/ZNTA-1803-maven-release-pipeline
  Home:   https://github.com/zanata/zanata-scripts
  Commit: 53b8f063e0315a3b750b695a2cd7c1bb538fab61
      https://github.com/zanata/zanata-scripts/commit/53b8f063e0315a3b750b695a2cd7c1bb538fab61
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2018-02-16 (Fri, 16 Feb 2018)

  Changed paths:
    M jenkins/maven-Jenkinsfile

  Log Message:
  -----------
  Use checkout, env.JENKINS_HOME