site: Add a warning about old artifacts to test-with
Because we are pruning build artifacts so aggressively we may not have the one requested via test-with. In this case the current behavior is... undefined - it may either error out or use the last deployed artifact on the machine. Let's document that gotcha for now as we work on improving the error handling.
Signed-off-by: Arkadiusz Hiler arkadiusz.hiler@intel.com