Fix style errors and upgrade hacking

Change-Id: Ide0f1546da5982e356904305b5ae4fcae574c7ab
Remove check already released in hacking 0.8.0

Change-Id: Icb4b9897feef970fb99493ed9b867574de8f42e7
Merge "Fix style errors and upgrade hacking"
Merge "Remove check already released in hacking 0.8.0"