tree 6a5604477d6096a8a9f4fa2597420bfedae20970
parent 4ebfea9d0de69a08aa74ef9a9fdfd941261361f9
author John Hua <john.hua@citrix.com> 1438865615 +0100
committer John Hua <john.hua@citrix.com> 1440668006 +0100

Add/Overwrite default images in IMAGE_URLS and detect duplicates

IMAGE_URLS could be set both in localrc with customization or stackrc by
default. By setting DOWNLOAD_DEFAULT_IMAGES, user could choose to add
default images to IMAGE_URLS or overwrite them.

As uploading duplicate images will cause a "409 Conflict" error, a
duplicate detection will expose it earlier.

Care needs to be taken that you don't end up with a duplicate image, so
clean up Xen's README.

Depends-On: I6fbae12f950a03afab39f341132746d3db9f788c
Change-Id: I3ca4e576aa3fb8992c08ca44900a8c53dd4b4163
Closes-Bug: #1473432