fix #0007360

check that unknown headers are allowed in DENM

requality/TS103096/root/Requirements/SEC_ITSS/SEC_ITSS_RCV/SEC_ITSS_RCV_DENM/SEC_ITSS_RCV_DENM_04/TP_SEC_ITSS_RCV_DENM_04_12_BV.json

+{
+    "attributes": {
+        "_author": {
+            "isGenerated": false,
+            "key": "_author",
+            "origin": "ab3ccc23-1082-43c7-8083-79207534ae29",
+            "type": "STRING",
+            "value": "filatov"
+        },
+        "_description": {
+            "isGenerated": false,
+            "key": "_description",
+            "origin": "ac8f470e-dde8-4c4a-9d88-ace56ac37351",
+            "type": "STRING",
+            "value": "Check that IUT accepts the Secured DENM containing additional non-standard HeaderField"
+        },
+        "_expectedResults": {
+            "isGenerated": false,
+            "key": "_expectedResults",
+            "origin": "ac8f470e-dde8-4c4a-9d88-ace56ac37351",
+            "type": "STRING",
+            "value": "with {\r\n\tthe IUT being in the 'authorized' state\r\n\tand the IUT current time is inside the time validity period of CERT_TS_AT_A\r\n}\r\nensure that {\r\n\twhen { \r\n\t\tthe IUT is receiving a SecuredMessage (MSG_SEC_RCV_DENM_A)\r\n\t\t\tcontaining header_fields[0].type\r\n\t\t\t\tindicating 'signer_info'\r\n\t\t\tand containing header_fields[1].type\r\n\t\t\t\tindicating 'generation_time'\r\n\t\t\tand containing header_fields[2].type\r\n\t\t\t\tindicating 'generation_location'\r\n\t\t\tand containing header_fields[3].type\r\n\t\t\t\tindicating 'its_aid'\r\n\t\t\tand containing header_fields[4]\r\n\t\t\t\tcontaining type\r\n\t\t\t\t\tindicating non-standard header field type (1000)\r\n\t\t\t\tand containing other_header\r\n\t\t\t\t\tindicating non-empty data\r\n\t\t\tand not containing other header fields\r\n\t} then {\r\n\t\tthe IUT accepts the SecuredMessage\r\n\t}\r\n}"
+        },
+        "_status": {
+            "isGenerated": false,
+            "key": "_status",
+            "origin": "ab3ccc23-1082-43c7-8083-79207534ae29",
+            "type": "STRING",
+            "value": "in process"
+        },
+        "_type": {
+            "isGenerated": false,
+            "key": "_type",
+            "origin": "ab3ccc23-1082-43c7-8083-79207534ae29",
+            "type": "STRING",
+            "value": "TestPurpose"
+        }
+    },
+    "uuid": "ac8f470e-dde8-4c4a-9d88-ace56ac37351"
+}
\ No newline at end of file