correct wrong column headers in electric motor file

VectoCore/VectoCoreTest/TestData/Hybrids/ElectricMotor/GenericMap240kW.vemo

-n [rpm], T [Nm], P_bat [W]
+n [rpm], T [Nm], P_el [W]
 0      , -1600 , 19.6898
 0      , -1550 , 18.5438
 0      , -1500 , 17.4322

VectoCore/VectoCoreTest/TestData/Hybrids/ElectricMotor/GenericMapGenerator.vemo

-n [rpm], T [Nm], P_bat [W]
+n [rpm], T [Nm], P_el [W]
 0, -900, 0.000
 0, -855, 0.000
 0, -810, 0.000

VectoCore/VectoCoreTest/TestData/Hybrids/GenericVehicle_Group5_P2.5/ElectricMotor/Inputdaten P2 Group 5/Electric components/GenericMap_30kW_50Nm.vemo

-n[rpm], T[Nm], P_el[kW]
+n[rpm] ,  T [Nm] , P_el [kW]
 0.00, -58.50, 2.46
 0.00, -56.67, 2.32
 0.00, -54.84, 2.18