BUG: Fixed ImageJ command line argument on Linux

Fixed a bug that was causing an annoying pop up in ImageJ whenever
the Show method was called on Linux systems.  Changed the image
file name was passed to ImageJ.  Now it is included in an open
command in the executed macro code.

Change-Id: Ic2902ccbec891d7050d22dbfab49026efd50e860
Merge topic 'SIMPLEITK-103_FixLinuxShow' into next

d0a3c41 BUG: Fixed ImageJ command line argument on Linux