sync zh/ en/ (#19918)

content/zh/examples/application/job/rabbitmq/Dockerfile

@@ -1,5 +1,5 @@
 # Specify BROKER_URL and QUEUE when running
-FROM ubuntu:14.04
+FROM ubuntu:18.04
 
 RUN apt-get update && \
     apt-get install -y curl ca-certificates amqp-tools python \

content/zh/examples/application/job/rabbitmq/worker.py

@@ -3,5 +3,5 @@
 # Just prints standard out and sleeps for 10 seconds.
 import sys
 import time
-print("Processing " + sys.stdin.lines())
+print("Processing " + sys.stdin.readlines()[0])
 time.sleep(10)