Add encode (payload) "UpperTester" for UtGnTrgger messages

ttcn/GeoNetworking/LibItsGeoNetworking_TypesAndValues.ttcn

@@ -933,6 +933,8 @@ module LibItsGeoNetworking_TypesAndValues {
             UInt16 lifetime,
             TrafficClass trafficClass,
             Payload payload 
+        } with {
+            encode (payload) "UpperTester"
         }
         
         /**
@@ -950,6 +952,8 @@ module LibItsGeoNetworking_TypesAndValues {
             UInt24 reserved,
             Area area,
             Payload payload 
+        } with {
+            encode (payload) "UpperTester"
         }
         
         /**
@@ -965,6 +969,8 @@ module LibItsGeoNetworking_TypesAndValues {
         type record GenerateSHBMessage {
         	TrafficClass trafficClass,
             Payload payload 
+        } with {
+            encode (payload) "UpperTester"
         }
         
         /**
@@ -979,6 +985,8 @@ module LibItsGeoNetworking_TypesAndValues {
             UInt16 lifetime,
         	TrafficClass trafficClass,
             Payload payload 
+        } with {
+            encode (payload) "UpperTester"
         }
         
         /**