<openshift-console> - Bug 957818 Update boot.rb to default to production env

https://bugzilla.redhat.com/show_bug.cgi?id=957818

This is similar to the logic in the boot.rb file for broker, and makes
it so that clearing the console cache via bundle exec "rails runner
Rails.cache.clear" does not require specifying the environment.
Merge pull request #2323 from detiber/railsEnvUpdate

Merged by openshift-bot