adapt generic vehicles: include legislative class

Generic Vehicles/Declaration Mode/Class2_RigidTruck_4x2/Class2_RigidTruck.vveh

 {
   "Header": {
     "CreatedBy": "",
-    "Date": "2017-06-22T11:15:06.0747543Z",
+    "Date": "2017-07-03T14:47:21.4326880Z",
     "AppVersion": "3",
     "FileVersion": 7
   },
   "Body": {
     "SavedInDeclMode": true,
     "VehCat": "RigidTruck",
+    "LegislativeClass": "N2",
     "CurbWeight": 4670.0,
     "CurbWeightExtra": 0.0,
     "Loading": 0.0,

Generic Vehicles/Declaration Mode/Class5_Tractor_4x2/Class5_Tractor.vveh

 {
   "Header": {
     "CreatedBy": "",
-    "Date": "2017-06-22T11:14:19.0107543Z",
+    "Date": "2017-07-03T14:47:35.9436880Z",
     "AppVersion": "3",
     "FileVersion": 7
   },
   "Body": {
     "SavedInDeclMode": true,
     "VehCat": "Tractor",
+    "LegislativeClass": "N3",
     "CurbWeight": 8229.0,
     "CurbWeightExtra": 0.0,
     "Loading": 0.0,

Generic Vehicles/Declaration Mode/Class5_Tractor_4x2/Class5_Tractor_DECL.vecto

 {
   "Header": {
-    "CreatedBy": " ()",
-    "Date": "2016-10-13T10:08:21.7776564Z",
+    "CreatedBy": "",
+    "Date": "2017-07-03T14:47:43.6586880Z",
     "AppVersion": "3",
     "FileVersion": 3
   },
@@ -51,12 +51,6 @@
         ]
       }
     ],
-    "StartStop": {
-      "Enabled": false,
-      "MaxSpeed": 5.0,
-      "MinTime": 5.0,
-      "Delay": 5.0
-    },
     "OverSpeedEcoRoll": {
       "Mode": "Overspeed",
       "MinSpeed": 50.0,

Generic Vehicles/Declaration Mode/Class9_RigidTruck_6x2/Class9_RigidTruck.vveh

 {
   "Header": {
     "CreatedBy": "",
-    "Date": "2017-06-22T11:16:11.6047543Z",
+    "Date": "2017-07-03T14:48:16.7076880Z",
     "AppVersion": "3",
     "FileVersion": 7
   },
   "Body": {
     "SavedInDeclMode": true,
     "VehCat": "RigidTruck",
+    "LegislativeClass": "N3",
     "CurbWeight": 9300.0,
     "CurbWeightExtra": 0.0,
     "Loading": 0.0,

Generic Vehicles/Declaration Mode/Class9_RigidTruck_AT_6x2/RigidTruck_6x2.vveh

 {
   "Header": {
     "CreatedBy": "",
-    "Date": "2017-07-03T12:21:03.6526880Z",
+    "Date": "2017-07-03T14:48:36.5106880Z",
     "AppVersion": "3",
     "FileVersion": 7
   },
   "Body": {
     "SavedInDeclMode": true,
     "VehCat": "RigidTruck",
+    "LegislativeClass": "N3",
     "CurbWeight": 7750.0,
     "CurbWeightExtra": 0.0,
     "Loading": 0.0,