This test script depends on the git-remote-testgit python script. This
python script makes use of the hashlib module which was released in python
version 2.5. So, add a new pre-requisite named PYTHON_2_5_OR_NEWER to
test-lib.sh and check for it in t5800.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>