Update quality tools

Brakeman:
- add config/brakeman.yml
- make sure bin/quality will exit on warn from brakeman
- skip CheckForgerySetting check
- Update brakeman to 2.4.3
- Fixup warnings

Rubocop:
- Move rubocop configuration to config/rubocop.yml
- Update rubocop to 0.20.1

RBP:
- Do not include feature files
- Do not skip lib/templates since we have no them here
- Do not skip config