Add "model_elements" that indicate finer grained aspects of a trust framework from TISA analysis

Issue #1191 resolved
Mark Haine created an issue

As part of analysis by Nick Mothershaw of the TISA project in the UK a proposal for a new section in the response called "model_elements" that allows for finer grained details of a proposed new trust framework for AML and KYC purposes aligned with the UK JMLSG guidelines. This framework can have different scores associated with different elements of the model (e.g. verification, validation and id risk)

...
    "evidence":[  
            {  
              "model_elements": 
                  [ 
                     { "model_element":"validation", "score":"2"},
                     { "model_element":"verification", "score":"2"}
                  ], // Allows combination for sripp and online banking logon //
               "type":"id_document",
               "status":"pending",
...