Comment 7 for bug 1785025

Reviewed: https://review.openstack.org/628878
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=bc29d4843d5d4a69c2b5e92475a805d218a9c55e
Submitter: Zuul
Branch: master

commit bc29d4843d5d4a69c2b5e92475a805d218a9c55e
Author: Akihiro Motoki <email address hidden>
Date: Mon Jan 7 15:39:42 2019 +0900

    Revert "Remove -u root as mysql is executed with root user"

    This commit was approved just to keep the consistency with
    other OpenStack projects, but most proposed changes related to it
    have been rejected so far [1].
    The main reason is because it is clearer to specify options explicitly
    and we should not assume some configuration.

    I totally agree these opinions and see no reason that neutron
    contineus to use different command line options for mysql.
    Consistency in the installation guide will bring better user experience.

    [1] https://review.openstack.org/#/q/file:%255Edoc/source/install/.*+message:mysql

    This reverts commit 59d178c9de6028016053f2a6958372e14ded386a.

    Related-Bug: #1785025
    Change-Id: I699d03de9e26d5784e6bd5e7d4fa219de6209207