Comment 6 for bug 1647459

Reviewed: https://review.openstack.org/407183
Committed: https://git.openstack.org/cgit/openstack/zun/commit/?id=d43b709ef8f3b833830d45cef829e268ab72ddb7
Submitter: Jenkins
Branch: master

commit d43b709ef8f3b833830d45cef829e268ab72ddb7
Author: Hongbin Lu <email address hidden>
Date: Mon Dec 5 14:06:14 2016 -0600

    Fix the check of docker installation

    In before, we checked docker installation by:

      $ rpm -q docker-engine

    However, this doesn't work for all cases. In some cases, the docker
    installation is of name "docker" instead of "docker-engine". This
    commit added check for "docker" as well.

    Change-Id: I49ef8cfe4bcf1d22770ba143c6301d8b54e9d372
    Closes-Bug: #1647459