Cleanup message shown while running destructive action against protected database

[prathamesh-sonpatki]

r? @schneems
Looks like this now

$ RAILS_ENV=production rake db:structure:load
rake aborted!
ActiveRecord::ProtectedEnvironmentError: You are attempting to run a destructive action against your 'production' database.
If you are sure you want to continue, run the same command with the environment variable:
DISABLE_DATABASE_ENVIRONMENT_CHECK=1
/Users/prathamesh/Projects/sources/rails/activerecord/lib/active_record/tasks/database_tasks.rb:51:in `check_protected_environments!'
/Users/prathamesh/Projects/sources/rails/activerecord/lib/active_record/railties/databases.rake:11:in `block (2 levels) in <top (required)>'
Tasks: TOP => db:structure:load => db:check_protected_environments
(See full trace by running task with --trace)

[schneems]

Looks great, thanks!