hdf5

Merge pull request #950 in HDFFV/hdf5 from ~BYRN/hdf5_adb:hdf5_1_8 to hdf5_1_8

* commit '6bda7f4a9d908771488c4652ecd4e6fe1ae51efd':
  Remove obsolete files
  Merge from develop HDFFV-8359 and remove FindMPI copies
  Change CMake min to 3.10