ATNA audit for ITI-81 including data from IUA SAML token

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See sections 3.81.4.2.3 and 3.81.5.1 in the RESTful ATNA Query Supplement.

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This issue is to be postponed till IHE clarifies the requirements -- see https://groups.google.com/forum/#!topic/ititech/gILRHFejQdY