changed clutch model: coach engine has not enough torque to drive off at 2%...

changed clutch model: coach engine has not enough torque to drive off at 2% slope -> increase engine torque for low engine speeds

VectoCore/VectoCoreTest/TestData/Components/24t Coach.vfld

 engine speed [1/min],full load torque [Nm],motoring torque [Nm],PT1 [s]
-560,1180,-149,0.6
-600,1282,-148,0.6
-799.9999999,1791,-149,0.6
+560,1500,-149,0.6
+600,1600,-148,0.6
+799.9999999,2150,-149,0.6
 1000,2300,-160,0.6
 1200,2300,-179,0.6
 1400,2300,-203,0.6