Bump hacking to 0.11.0 in test-requirements
Bump hacking to 0.11.0 in test-requirements

Hacking's latest release is 0.11.0. Most other ironic projects are using
this release.

These updates are done project-by-project to avoid introducing
unexpected new hacking rules to projects. This version bump already
applies cleanly to python-ironic-inspector-client with no code style
changes.

Change-Id: Ibd8d3a8a0ccbfaafb24761ae783490bc32c21709

openstack/python-ironic-inspector-client