title: How to wait for a step completion in AWS EMR cluster using Boto3
body: <p>Given a step id I want to wait for that AWS EMR step to finish. How can I achieve this? Is there a built-in function?</p>
  
  <p>At the time of writing, the Boto3 Waiters for EMR allow to wait for Cluster Running and Cluster Termination events: </p>
  
  <p><a href="http://boto3.readthedocs.io/en/latest/reference/services/emr.html#waiters" rel="noreferrer">EMR Waiters</a></p>