BufferMgr → CudaMgr Relation

File in DataMgr/BufferMgr	Includes file in CudaMgr
CpuBufferMgr / CpuBuffer.cpp	CudaMgr.h
CpuBufferMgr / CpuBufferMgr.cpp	CudaMgr.h
GpuCudaBufferMgr / GpuCudaBuffer.cpp	CudaMgr.h
GpuCudaBufferMgr / GpuCudaBufferMgr.cpp	CudaMgr.h
CpuBufferMgr / TieredCpuBufferMgr.cpp	CudaMgr.h