Match Pika example in output

This is what test.py expects

ruby/rpc_server.rb

@@ -22,6 +22,8 @@ class FibonacciServer
       n = payload.to_i
       r = self.class.fib(n)
 
+      puts " [.] fib(#{n})"
+
       @x.publish(r.to_s, :routing_key => properties.reply_to, :correlation_id => properties.correlation_id)
     end
   end
@@ -44,4 +46,6 @@ begin
 rescue Interrupt => _
   ch.close
   conn.close
+
+  exit(0)
 end