[zanata/zanata-client] 1c7c3a: doc(install): Update instruction for RHEL 7

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zanata/zanata-client
  Commit: 1c7c3a6d3ce9b20c59acd05e5bbb574df7840220
      https://github.com/zanata/zanata-client/commit/1c7c3a6d3ce9b20c59acd05e5bbb574df7840220
  Author: Ding-Yi Chen <dingyichen at gmail.com>
  Date:   2015-10-29 (Thu, 29 Oct 2015)

  Changed paths:
    M docs/installation/linux-installation.md

  Log Message:
  -----------
  doc(install): Update instruction for RHEL 7