[zanata/zanata-platform] a1474a: Discard artifacts after 4 builds

[GitHub]

  Branch: refs/heads/Jenkinsfile
  Home:   https://github.com/zanata/zanata-platform
  Commit: a1474a874664d8a7380b8024042ce4a1109cb616
      https://github.com/zanata/zanata-platform/commit/a1474a874664d8a7380b8024042ce4a1109cb616
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2017-03-28 (Tue, 28 Mar 2017)

  Changed paths:
    M Jenkinsfile

  Log Message:
  -----------
  Discard artifacts after 4 builds