Explain/comment handleBodyParserError
Fixed Grunt in test environment.
Changed callback doc to say production/non-production.
Merge pull request #1930 from twg/psobot/grunt-fix

Fixed Grunt hook when not in development or production environments.
1. fix policy doesn't protected blueprint action with custom route option
2. fix policy doesn't protected custom blueprint action
3. fix sails fails to lift if using in-exist model in route config
Merge remote-tracking branch 'origin/fix-policy-protect-bp'