ENH: Add utility script to create JRE tarballs.

These tarballs will be uploaded to the Midas server to be
used by the SCIFIOImageIO module.

Change-Id: I180cf0957221762ddf62b14e3712b70fe19e03bb
Merge topic 'JREUpdate'

7a1981e ENH: Add utility script to create JRE tarballs.