Supporting all Heat parameter types

-For now allowing all types and make them string.
-Heat support much more types than it is stating here,
causing the new templates to fail. We should switch for
Horizon code, for generating of the form and follow the heat
specification there.

Change-Id: Ic6b40023ba9301ecfb3630f31a1f396c2d35cf3e
Merge "Supporting all Heat parameter types"