Agent does not provide enough information to troubleshoot failed image downloads

[Jay Faulkner]

In this run:

http://logs.openstack.org/37/141737/29/check/check-tempest-dsvm-ironic-agent_ssh/8a87dcb/logs/ironic-bm-logs/baremetalbrbm_0_console.txt.gz

We discovered IPA only send back image ID and URL when it fails to download; it doesn't provide a status code or any details of the response, making troubleshooting nearly impossible.

We should update the ImageDownloadError to require status code and response text and ensure that gets logged locally and passed on to the Ironic API.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/155080

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/155080
Committed: https://git.openstack.org/cgit/openstack/ironic-python-agent/commit/?id=e5d88be8cb98298323b4644dff08b38fc970f1cd
Submitter: Jenkins
Branch: master

commit e5d88be8cb98298323b4644dff08b38fc970f1cd
Author: Jay Faulkner <email address hidden>
Date: Wed Feb 11 14:20:02 2015 -0800

    Log required troubleshooting info on image dl fail

    Currently, we only log the image ID and attempted URL. Now, we log the
    status code recieved and detailed information about how and when things
    failed.

    Change-Id: I718c7facbe1500d98be78b7b6137e92fdfb2fdf1
    Closes-bug: 1420981
    Depends-On: I69f6f6eef4ad573f406d64d579a9811c70ac5d28