Comment 2 for bug 1707176

Reviewed: https://review.openstack.org/488386
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=b9c0252a4c0433ef6cef392696a4affbb335fcaf
Submitter: Jenkins
Branch: master

commit b9c0252a4c0433ef6cef392696a4affbb335fcaf
Author: zhiguo.li <email address hidden>
Date: Fri Jul 28 19:28:58 2017 +0800

    Add the step to install apache2 libapache2-mod-wsgi

    The guide uses the Apache HTTP server with mod_wsgi to serve
    identity service, but it did not introduce the step to install
    Apache2 and libapache2-mod-wsgi package in this guide. The identity
    service will not be started without these two packages.
    This patch modify the step 1 in part "Install and configure components"
    for installing two packages metioned above.

    Change-Id: I8ca55e605f806bdc48f753ab893040d9a76aa93d
    Closes-Bug: 1707176