Merge pull request #28 from ChandravatiSG/db_connection_pool_fix

#27 Fixed DB connection pool issue.

lib/crono/job.rb

@@ -42,6 +42,7 @@ module Crono
       @semaphore.synchronize do
         update_model
         clear_job_log
+        ActiveRecord::Base.clear_active_connections!
       end
     end