problems → partition Relation

File in src/problems	Includes file in src/algorithms/partition
Zoltan2_MappingProblem.hpp	Zoltan2_TaskMapping.hpp
Zoltan2_PartitioningProblem.hpp	Zoltan2_PartitioningAlgorithms.hpp
Zoltan2_PartitioningSolution.hpp	Zoltan2_CoordinatePartitioningGraph.hpp