
While an end user would never use both redhat-common and ubuntu elements at the same time we should always use unique names for things per DIB conventions. Change-Id: I2cabc583a1fd41d4fe7fbf8cf93127d49e26aff4
Use Ubuntu cloud images as the baseline for built disk images.
Overrides:
- To use a non-default URL for downloading base Ubuntu cloud images, use the environment variable DIB_CLOUD_IMAGES
- To download a non-default release of Ubuntu cloud images, use the environment variable DIB_RELEASE
- To use different mirrors rather than the default of archive.ubuntu.com and security.ubuntu.com, use the environment variable DIB_DISTRIBUTION_MIRROR