egammaSuperCluster Fixes for ATLASRECTS-5873,ATLASRECTS-5874.
requested to merge ATLAS-EGamma/athena:egammaSuperClusterBuilder_and_constrained_unconstrained_option into master
ATLASRECTS-5873,ATLASRECTS-5874.
- Be midfull of the fact that L3 has different granularity (add option) .
- Add a bit meaningfull info message.
- Also removed unused options (defaults 999 never changed or to be changed)
Mentioning @turra. This I kept compatible but it has the options to try a small tune .