hdfeos5: calc/write latitude/longitude if missing in geometry file

[yunjunz]

Description of proposed changes

• save_hdfeos5: always write latitude/longitude dataset, and calculate based on metadata if missing in the geometry file, such as ARIA. Related to hdfeos5: latitude/longitude missing for hyp3 product #1049.

• cli/save_hdfeos5: check the coordinate of input file

• improved UNIT and fig title handling for HDF-EOS5 product:

  • utils.readfile.read_attribute(): while grab the UNIT, use the last segment of dataset name if "/" is used
  • view.plot_subplot4figure(): use the last segment as the auto figure title, instead of the 2nd one, to be more generic

• view: improved auto figsize for subplots when there is only one row of subplots

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