Add modelschema test

  * Alligh run_tests.sh
    disable system-wide salt env - it's
    make no sense to test with non-isolated env.
    Extend some logging
  * Rename test pillar's
  * fix test pillar
  * fix auth_keys directory dependency
  * fix linux.system test process
  * fix known_host.sls - user actual user.name,instead of iterator one

Change-Id: I4a3a86e383136945433e7f33c37cf00b03ba1cdb
15 files changed