Add EE usage ping

This MR implements the EE usage ping as a sidekiq-cron async task as discussed in #380 (closed). Currently we report:

• Active user count
• Max historical active user count
• License data (e.g. licensee, add-ons, etc.)

Screenshot:

config/initializers/1_settings.rb

@@ -131,7 +131,7 @@ def cron_random_weekly_time
       hour = rand(24)
       minute = rand(60)
 
-      "#{hour} #{minute} * * 0"
+      "#{minute} #{hour} * * 0"
     end
   end
 end