Cap GitPython at 2.1.1 due to performance degradation

It appears newer versions of GitPython have slowed considerably.
Cap GitPython until https://github.com/gitpython-developers/GitPython/issues/605
is resolved.

Change-Id: Ie6c8722e8b607bb50e77fbad59e18363616f7e0d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
1 file changed