JPSSnagg

JPSS-49: -d output directory option
Added test to verify Output directory name, with other product names, will not
exceed the space allocated for the output name buffer.
(Notes: the length check is on the conservative side.)

src/nagg_select_granules.c:
    Added code to check outdirectory length. It is on the conservative side.
    It works for now.
src/nagg_main.c:
    Added code to exit the tool if compose_output() returns error.
test/testnagg.sh:
    Added tests to verify the output directory name is within the limit
    of the output file buffer.
test/testfiles/satms_tatms2-d-S.txt:
test/testfiles/satms_tatms2-d.txt:
test/testfiles/satms_tatms2-d-g0.txt:
   New expected output for the newly added output directory length tests.

Tested: koala and jam.