client: Add function run_tesplan_on_iso
client: Add function run_tesplan_on_iso

This is a convenience function to test an iso against a testplan

Signed-off-by: Fabian Deutsch <de69c509e52dfe544d526a81279fe21e1252748c@fedoraproject.org>

fabiand/igor,fabiand/igor,fabiand/igor