fix several bugs that were causing ClassChecker to skip some data classes and ClassDumper to not report std::vector, std::map, etc. as data classes
ConstCast and ConstCastAway only report if member is a data class
Merge pull request #3489 from gartung/clang-fix-missing-data-classes

ClangSA -- Fixes for missing data classes and add filtering to ConstCast and ConstCastAway checkers