* commit '145ef3ceee20c28a443bd11507c58858bea3f889':
more cleanup
change it back
pick up missing piece
fix unused related warnings
removed unused parameter
more fix and address comments
remove unsed var,function,macro, etc
* Macro cleanup and obvious warning fixes in parallel code.
* Moved H5FD comm and info dup/free wrapper code to a new H5mpi.c file
and separated it to deal with each MPI type separately.