Corrected faulty assumption about query param serialization of non-flattened lists.

It was previously assumed that list-members that had a name trait would
use that in-place of the '.member' prefix.  This was discovered to be
an incorrect assumption.
Added support for wrapper elements to Query XML response parsing.
Updated RDS API by adding wrapper elements around a number of operations to fix XML parsing.
Updated RDS features to reflect the new API config changes (added wrappers).