The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.
Fix problems found:
E117 over-indented
Blacklist:
E402 module level import not at top of file
W504 line break after binary operator
Change-Id: I05b04a6f15683f7f37a5be49cc50c02eb3bbf7a7