added 0_common/50_set_OS-version.sh: sets $OS_VERSION to 5 or 6 depending on return of t_DistCheck
    changed p_git/0-install_git.sh: Test is skipped in C5
    changed p_git/10-test_git.sh: made test more verbose (added t_Log), skipping on C5
    changed p_git/11-test_git_clone.sh: made test more verbose (added t_log), test now ends in the original dir (previously it ended in /tmp, skipping on C5
    changed p_git/12-test_git_log.sh: made test more verbose (added t_log), test now ends in the original dir (pr
    eviously it ended in /tmp, skipping on C5