Comment 4 for bug 1815243

Reviewed: https://review.openstack.org/635954
Committed: https://git.openstack.org/cgit/openstack/charm-glance/commit/?id=8b2c46cff7035db47af8ca344feaebd4ebac6633
Submitter: Zuul
Branch: master

commit 8b2c46cff7035db47af8ca344feaebd4ebac6633
Author: Ryan Beisner <email address hidden>
Date: Fri Feb 8 15:49:27 2019 -0600

    Update pre-install hooks to fail on error

    The pre-install operations may fail, yet that failure is not
    elevated to the user. This masks the failure and makes early
    package install issues difficult to troubleshoot.

    If the basic pre-install script fails, the charm should not
    proceed to later hooks as the requirements may not be met.

    Hashbangs for bash should specify -e (errexit) on all of the
    pre-install bash scripts.

    Change-Id: Iac27d10d928bd0cca60a52564fab4d8082ca1edb
    Closes-bug: #1815243
    Partial-bug: #1815231