This patch replaces boilerplate in container related tests with
oci-image plumbing from (gnu services containers).
* gnu/tests/containers.scm (%oci-tarball): New variable;
(run-rootless-podman-test): use %oci-tarball;
(build-tarball&run-rootless-podman-test): drop procedure.
* gnu/tests/docker.scm (%docker-tarball): New variable;
(build-tarball&run-docker-test): use %docker-tarball;
(%docker-system-tarball): New variable;
(build-tarball&run-docker-system-test): new procedure.
Change-Id: Iad6f0704aee188d89464c83722dea0bb7adb084a
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>
cc07ecd7cc