Comment 2 for bug 1707948

Reviewed: https://review.openstack.org/489640
Committed: https://git.openstack.org/cgit/openstack/paunch/commit/?id=64df79c70d4156da2bcc29eb18d12b0193414dc7
Submitter: Jenkins
Branch: master

commit 64df79c70d4156da2bcc29eb18d12b0193414dc7
Author: James Slagle <email address hidden>
Date: Tue Aug 1 11:42:20 2017 -0400

    Log stdout/stderr during error

    Paunch does not currently show stdout/stderr from the docker cmd when an
    error happens. Without this output, there is no way to tell what
    actually caused the container command to fail.

    Log the output with LOG.error if we get an unexpected return code so
    that the actual error is displayed to the user.

    Change-Id: I951cdf0cb2bfd87a22a239ff7522ab5bba9d6eb6
    Closes-Bug: #1707948