- Created new class PredicatePartition
- Updated AbstractionManager to use PredicatePartition for ordering
- Updated PredicateCPA and WpCPA to pass solver to the AbstractionManager (required for implication ordering in partitions)

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/svproj-bddvarorder@15038 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c