Enable H403

Fix the only two places where it triggered alongway.

Change-Id: Ib76e0e072c2d51a9c782f37d5f5df964f2db968f
raise an UnknownUserParameter exception when receiving an unknown param

add some validation logic to Parameters, so that when an invalid param
is passed in an exception will be raised.

Fixes bug #1186790

Change-Id: I8aece556d8fc5cd5533f4baf041e345bdc5722ec
Merge "raise an UnknownUserParameter exception when receiving an unknown param"