Add test for Neutral functors and Remove IsNotE functor
Add test to TestFunctors.cpp. Template it to incorporate also the test for ProbNN functors.
It has been pointed out that IsNotE will not be updated for Run 3, as it's not possible to distinguish between photons and electrons with only Ecal information (without the SPD detector).
Additionally, explicitly add include for dependency.
Edited by Miroslav Saur