Added code to write via FMS2 interfaces

  Added a large number of calls to handle all of the writes via the FMS2
interfaces to infra/FMS2/MOM_io_infra.F90.  There are newly defined private
types in MOM_io_infra to wrap the axistype and fieldtype that had previously
been offered from mpp_io_mod.  All answers are bitwise identical and it has been
verified that output files do not change and the restarts are still working.