CaloEvent_CaloUtils+CaloTPCnv: Fix cppcheck warnings.

cppcheck warnings:

• Array bounds check ordering.
• Spurious uninitialized variable warnings.
• Spurious objectIndex warnings.
• Prefer preincrement to postincrement for iterators.
• Redundant member initialization.
• Prefer to initialize members in an initialization clause, rather than in a function body.
• Pass std::string by const reference, not value.