Updated openstack/openstack
Project: openstack/nova  e8b085293cf525d16570afa01e4a07da84e6fe8b

Enable pep8 on ./tools directory

This patch fixes the pep8 issues of the tool scripts and
configures tox to run pep8 on the tools directory.

Two hacking rules have been modified to ignore the tool directory as both
rules are checking oslo usage which is not critical in case of tools
- N310 use timeutils instead of datetime module
- N324 use jsonutils instead of json module

The tools/xenserver directory is still excluded from pep8 as it contains
scripts that are expected to run on dom0 with python2.4 therefore the
following rules cannot be meaningfully followed
- H231  Python 3.x incompatible 'except x,y:' construct
- H233  Python 3.x incompatible use of print operator

Change-Id: Icfd9e708a2ca1e421676b410e41807b2e630718f