2014.12.06 MSS Code Factory 2.1.12677 Corrected defect for Relationship imports

The IsXsdContainer attribute wasn't being carried through properly by the SchemaRef
element's import of a referenced SchemaDef.Table.Relation.  Without the correct values
in place, the code produced for the SAX structured object parsers was incorrect,
because it wasn't properly considering imported relationships to be XML element containers.

Quite frankly, I don't know whey the code worked for 2.0/2.1 in the first place and
was only detected when using 2.1 to produce and exercise CFDbTest 2.2.  Obviously
something changed, but what?  The rules were just ported forward, and so was the engine
code.  The only thing that makes sense is that the value initializations for the boolean
requiredIsXsdContainer attributes of the buffers were defaulting to true instead of false,
causing *all* components relationships to be considered and evaluated as possible XML element
container relationships.  Given the way I determine whether a given instance *can* be an element
of a container element, it's entirely possible that my code was just successfully filtering
out candidates that should never have been XSD elements in the first place.  It *is* pretty
thorough in it's consideration of the class hierarchies being evaluated.