Run on python2 by default
Run on python2 by default

On systems where Python 3 us the default one, git-publish will fail when
ran due to different syntax.  Using python2 in shebang fixes the problem.

Signed-off-by: Martin Kletzander <e82f23e74d43760279ebcc505dac4ae70d5627d0@redhat.com>

stefanha/git-publish,stefanha/git-publish