[zanata/zanata-parent] 17f031: Update guava to 18.0

[GitHub]

  Branch: refs/heads/guava18
  Home:   https://github.com/zanata/zanata-parent
  Commit: 17f0314eea13f435842cee639f4ac71e95f494c7
      https://github.com/zanata/zanata-parent/commit/17f0314eea13f435842cee639f4ac71e95f494c7
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2016-07-27 (Wed, 27 Jul 2016)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  Update guava to 18.0