Use the jruby environment as the indicator of the General Available channel

I've been using my own instance as a secondary alpha channel.

app/canary/dao/jenkins.rb

@@ -25,7 +25,7 @@ module CodeValet::Canary::DAO
 
     def rebuilt_ga
       return cache.get_or_set('rebuiltGA', :expires_in => CACHE_SECONDS) do
-        rebuilt_for('rtyler')
+        rebuilt_for('jruby')
       end
     end