Updated openstack/openstack
Project: openstack/requirements  49335b1de8926cfbc75f7e82e9dab1fbfd8b480f

Add flake8 2.2.2

Flake8 2.2.0 has no new tests but does add parallelization, which is
enabled by default, so we want to move hacking over to use flake8 2.2.2.

The move to flake8 2.2.2 is done in two steps since our
global-requirements system does not allow for non-overlapping changes.

flake8 2.2.0 had a bug with parallelization on windows, 2.2.2 fixed that.

Change-Id: Ib2ccf27cf4ba5cfe2c3f51aebc2859af5a57b998