- fix wrong indices for OBEeta & OBWeta - add tileHasOBN,S,E,W conditions.
- fix wrong indices for OBEeta & OBWeta
- add tileHasOBN,S,E,W conditions.

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