Use HTTP instead of https because Ignition does not recognise
letsencrypt certificates, leading to test breakage in
docker.torcx-manifest-pkgs.
Add a note in settings.env to explicitly call out HTTP requirement of
build cache server.
Signed-off-by: Thilo Fromm <thilo@kinvolk.io>
This change updates the package build script to publish the torcx
manifest file to the build cache so it can be used by tests.
It also updates the generic test script to use the SDK container instead
of the packages container image, and to download and use the torcx
manifest from the build cache.
Signed-off-by: Thilo Fromm <thilo@kinvolk.io>
