Remove public modifiers from classes
in org.sosy_lab.cpachecker.cfa.parser.eclipse.{c,java} packages.
Because we load these classes in a separate class loader,
they may not be used directly.
All classes used by classes outside of these packages
need to be moved to other packages
(this is done with CBinaryExpressionBuilder).
Also move NameConverter directly to the "java" package
such that it does not need to be public.

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@14379 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c