BUG-1759: SET_NW_TOS action values

- changed adapters in sal-compatibility to switch:
  - AD-SAL to MD-SAL = DSCP to TOS (no ENC present)
  - MD-SAL to AD-SAL = TOS to DSCP (ENC destroyed)

Change-Id: Ie4954f4c76fc19e70f27a41df0a1a65907acade4
Signed-off-by: Michal Rehak <mirehak@cisco.com>
Merge "BUG-1759: SET_NW_TOS action values"