make overload buffer larger so that the GEN is able to provide sufficient...

make overload buffer larger so that the GEN is able to provide sufficient energy on the interurban cycle (testcase S2 APT-N)

VectoCore/VectoCoreTest/TestData/Hybrids/GenericVehicle_S2_APTN/GenericGen.vem

@@ -13,7 +13,7 @@
     "ContinuousTorqueSpeed": 1850,
     "OverloadTorque": 1030,
     "OverloadTorqueSpeed": 1850,
-    "OverloadTime": 120,
+    "OverloadTime": 240,
     "ThermalOverloadRecoveryFactor": 0.9,
     "VoltageLevels": [
       {