Updated openstack/openstack
Project: openstack/cinder  1ac9c2f7ef6ab6860ccd44043ae8892002d20bdd

Enable import group hacking rule

This change enables H305, H307 included in newly updated hacking 0.9
all violations are fixed.

H305, H307 will check if imports are grouped in stdlib, 3rd libs and
OpenStack components.

Change-Id: I612cae64982450a9be5207dbe26a2b52da49dac6