o eesupp & mdsio (SingleCpuIO):   - move mapping to global io-buffer inside gather_2d/scater_2d.
o eesupp & mdsio (SingleCpuIO):
  - move mapping to global io-buffer inside gather_2d/scater_2d.

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h