[zanata/zanata-platform] ab7009: Add back maven -T 1

[GitHub]

  Branch: refs/heads/Jenkinsfile
  Home:   https://github.com/zanata/zanata-platform
  Commit: ab7009fa402e7548f6fbf5578cb2eeb6f6b56ff8
      https://github.com/zanata/zanata-platform/commit/ab7009fa402e7548f6fbf5578cb2eeb6f6b56ff8
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2017-03-20 (Mon, 20 Mar 2017)

  Changed paths:
    M Jenkinsfile

  Log Message:
  -----------
  Add back maven -T 1