Unpin gevent and avoid patching subprocess

Unpin gevent and avoid patching subprocess

Recently, gevent updated to 1.1.0, breaking a few things like misc.sh().
PR #810 pinned gevent to 1.0.2, but I wanted to properly investigate the
issue to not be stuck on an old version. Some git bisects later, I
discovered that gevent began patching the subprocess module by default
in:

https://github.com/gevent/gevent/commit/fc73e9afa34d811ede5d62531025d2e3876b8c01

Unpinning gevent and also telling it not to patch subprocess fixes the
issue.

Signed-off-by: Zack Cerza <zack@redhat.com>