Add Tom's regional DA dycore fix (NOAA-EMC#26)

* regional DA fix from Tom: delz halo fix and Changes for putting GSI anl into boundary file
Co-authored-by: Tom Black <Tom.Black@noaa.gov>
* Add changes for when INTERNAL_FILE_NML is not used from Dan.
Co-authored-by: Daniel Holdaway <dan.holdaway@nasa.gov>
* remove hardcoded levp=65 for source_FV3GFS
Co-authored-by: Jun Wang <junwang-noaa@users.noreply.github.com>
Co-authored-by: Tom Black <Tom.Black@noaa.gov>
Co-authored-by: Daniel Holdaway <dan.holdaway@nasa.gov>
Co-authored-by: Kate Zhou <xiaqiong.zhou@noaa.gov>

model/fv_control.F90

@@ -996,7 +996,7 @@ subroutine read_namelist_fv_grid_nml
        ! Read Main namelist
        read (f_unit,fv_grid_nml,iostat=ios)
        ierr = check_nml_error(ios,'fv_grid_nml')
-       rewind (f_unit)
+       call close_file (f_unit)
 #endif
        call write_version_number ( 'FV_CONTROL_MOD', version )
        unit = stdlog()