Comment 2 for bug 1768354

Reviewed: https://review.openstack.org/565599
Committed: https://git.openstack.org/cgit/openstack/diskimage-builder/commit/?id=10b2a5a4ee1c5c6c16f61277b7795500f0a72886
Submitter: Zuul
Branch: master

commit 10b2a5a4ee1c5c6c16f61277b7795500f0a72886
Author: Oded Le'Sage <email address hidden>
Date: Tue May 1 16:39:01 2018 -0500

    Fixes add-apt-keys in dpkg element

    This commit addresses the issue described in bug 1768354 when using the
    apt-sources element and adding a key to a custom repo, subsequent deb
    package installs fail due no update of the repo before package install

    Change-Id: I968b3422fab2fb2305426d49215391d8ba7499df
    Closes-Bug: 1768354