Improved bugsnag reporting

- Include release stage, which should be 'production' or 'development',
  and gets postfixed by '-debug' when running in debug mode.
- Properly logging remote IP address when proxied through HAProxy;
- Log user ID, email, username, roles, and capabilities;
- Remove authentication tokens from logged session;
- Log request data and JSON separately.
- Added request endpoint.

pillar/config.py

@@ -63,6 +63,7 @@ GOOGLE_SITE_VERIFICATION = ''
 ADMIN_USER_GROUP = '5596e975ea893b269af85c0e'
 SUBSCRIBER_USER_GROUP = '5596e975ea893b269af85c0f'
 BUGSNAG_API_KEY = ''
+BUGSNAG_RELEASE_STAGE = 'development'
 
 ALGOLIA_USER = '-SECRET-'
 ALGOLIA_API_KEY = '-SECRET-'