[zanata/zanata-scripts] a02313: Use constant branch name

[GitHub]

  Branch: refs/heads/ZNTA-1803-maven-release-pipeline
  Home:   https://github.com/zanata/zanata-scripts
  Commit: a0231354fd2b11a3e333b864772a5c895684e5f8
      https://github.com/zanata/zanata-scripts/commit/a0231354fd2b11a3e333b864772a5c895684e5f8
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2017-11-21 (Tue, 21 Nov 2017)

  Changed paths:
    M jenkins/maven-Jenkinsfile

  Log Message:
  -----------
  Use constant branch name