Adding user-provided policy files to the data access request

Updating request to edc-provider to handle errors;
Adding request to policy-issuer to send policy file;
Adding step to notify errors;

workflows/isst-related/DAR/dar-template.json

@@ -26,12 +26,7 @@
                 {
                     "odrl:action": "use",
                     "odrl:constraint": [
-                        {
-                            "odrl:leftOperand": "fileName",
-                            "odrl:operator": "eq",
-                            "odrl:rightOperand": "%FileName%",
-                            "odrl:comment": "Data access application form completed by the data consumer"
-                        }
+                        %FILE_CONSTRAINTS%
                     ]
                 }
             ]