Allow arbitrary files in test images.

[willmtemple]

This patch will allow arbitrary files to be inserted into the test images.

If you have a file hierarchy that looks like this:

• test-images/
  • Dockerfile.
  • Dockerfile..d/
    • foo

Then the directory Dockerfile.<id>.d will be available to the image at build time, and can be added to the image, e.g. (with an of 'foo') as
Dockerfile.foo:

FROM rhel7:7.1-9
MAINTAINER "William Temple <wtemple at redhat dot com>"

ADD ./Dockerfile.foo.d/some_script.sh /usr/bin/some_script
RUN "chmod +x /usr/bin/some_script"

The script will also now rebuild any test-images whose files have changed.

@rhatdan RFC. I think this is the cleanest way to add arbitrary files to these test images.

@sallyom This should enable you to add scripts/etc. to the test images, and you should then be able to take the "docker build" logic out of your test script.

Signed-off-by: William Temple wtemple@redhat.com

[rhatdan]

LGTM