Fix misleading indentation warnings
- Fix misleading indentation warnings in SimComponents/src/MCEventTypeFinder and LoKiCore/src/Services.cpp
- LHCbMath: Suppress compilation warnings from Eigen (and ROOT, CLHEP, Boost, already done at project level)
- LoKiCore: Suppress compilation warnings from ROOT and Boost (already done at project level)
- Remove a redundant StatusCode return in MCEventTypeFinder