Imported Translations from Transifex

Change-Id: I5052c7a1dc3de38fef14046078d93c583c7cee73
Fix all occurences of H404 Hacking warning

This fixes all triggers of hacking 0.6.x's warning:
H404 - multi line docstring should start with a summary.
and enables gating check on H404.

Change-Id: I034bd1f05da3f279d8d79aa14a7f6ce8bef5047c
Merge "Imported Translations from Transifex"