Fix resource identifier binding validation

[kstich]

This commit fixes a bug where only the names of identifiers were validated, not the ShapeId that represent them, when testing the binding of operations to resources.

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[mcmasn-amzn]

I think this broke one of my models. Is there a way to model an API which accept a single string field which can be one of multiple ways to identify a resource? Example -- I have an API that is similar to lambda:GetFunction, which accepts have multiple name formats (full arn or name or partial arn), but only one is considered the true, full identifier in the resource model.