Preserve lookup tables when exporting from ImageJ

Fixes ticket https://trac.openmicroscopy.org.uk/ome/ticket/11658.

To test, convert the file named in the ticket to OME-TIFF using ```bfconvert``` and ImageJ, and verify that all three files have the same coloring when opened in ImageJ.  The color option in ImageJ should be set to ```Default``` when opening each of the files.