BufferMgr → Logger Relation

File in DataMgr/BufferMgr	Includes file in Logger
Buffer.cpp	Logger.h
BufferMgr.cpp	Logger.h
CpuBufferMgr / CpuBuffer.cpp	Logger.h
GpuCudaBufferMgr / GpuCudaBuffer.cpp	Logger.h
GpuCudaBufferMgr / GpuCudaBufferMgr.cpp	Logger.h