change tile to processor setting (in case nSy*nPy > 1):  allows default model mapping (myX and myYGlobalLow) to be used for simple  (1 facet, no blank tile) config.
change tile to processor setting (in case nSy*nPy > 1):
 allows default model mapping (myX and myYGlobalLow) to be used for simple
 (1 facet, no blank tile) config.

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