[zanata/zanata-server] 6c8bcd: Fix according to the review comments

[GitHub]

  Branch: refs/heads/ZNTA-1169-overlay
  Home:   https://github.com/zanata/zanata-server
  Commit: 6c8bcd31f5533880b37bbbbae9879f372d5840d0
      https://github.com/zanata/zanata-server/commit/6c8bcd31f5533880b37bbbbae9879f372d5840d0
  Author: Ding-Yi Chen <dchen at redhat.com>
  Date:   2016-06-16 (Thu, 16 Jun 2016)

  Changed paths:
    M docs/user-guide/system-admin/configuration/installation.md

  Log Message:
  -----------
  Fix according to the review comments