Allow section to have parent like tox.ini, i.e:
would have foo:bar getting the image image1 since dependent of foo
Try to emulate tox -e type of target/environment.
This works natively in tox.ini as long we have commands to run there
(doesn't support inheritance).
For dox.yml the format has been improved, the format looks now like this :
we still support old format with single target.
Follow up patches in this series improve this implementation.
This patch adds support for running tests on multiple images. Instead of
parsing just 1 image, it attempts to always parse multiple images from
config files and/or CLI.
To run dox on multiple images from the CLI, you'll have to:
$ dox -i infra/trusty,infra/f20
The tox.ini `docker:images` option is now a comma-separated list of
images, whereas the dox.yml one is an array of images.