VP1HEPVis+VP1AODSystems: Fix clang warnings.
clang warnings:
- Remove unneeded #define private.
- Unused variables.
- Fix typo in qualityString(); was calling wrong method.
- Fix arg-passing problem in JetCollectionSettingsButton::Imp::createMaterial (int used for a float arg)
- Remove MissingEtCollHandle::Imp::collHandle. Was unused and anyway just called itself.