tests: Clearer message

Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
build: Add install-image target

This target will install a rootfs to a disk using the installation.ks

Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
build: Just poweroff after installation

Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
Merge branch 'install-image'

This branch adds a feature which introduces a new target image-install,
which simulates the way of the first image install to a host.