JPSSnagg

Bug fix: JPSS-59 Nagg output file name with product ID sorted

Description: the product ID list, including the Geolocation PID, in the output
file names, were not sorted.

Solution:
For the unpackaged format, since there is only one product ID per file, the
name is always sorted. For the packaged format, use a temporary buffer to hold
all the product ID plus the optional geolocation product ID, then sort it
before using it to generate the header part of the output file names.

Also, update many of the expected output files to match the now sorted
product IDs.

Added a test to testnagg.sh by showing commands of the same -t list but in
different produce the "same" output files, at least for the product-IDs part.

Tested: Jam, Koala.