[zanata/zanata-platform] fdb3ab: wip: also need to clean in checkout stage

[GitHub]

  Branch: refs/heads/Jenkinsfile
  Home:   https://github.com/zanata/zanata-platform
  Commit: fdb3abfffe00ca13a3871b37300b28704f7dce6f
      https://github.com/zanata/zanata-platform/commit/fdb3abfffe00ca13a3871b37300b28704f7dce6f
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2017-03-16 (Thu, 16 Mar 2017)

  Changed paths:
    M Jenkinsfile

  Log Message:
  -----------
  wip: also need to clean in checkout stage