title: Cassandra upgrade from 2.1.13 to 2.2.9
body: <p>Could any advise the procedure for upgrade cassandra from 2.1.13 to 2.2.9?
  Do I need to run nodetool upgradesstables?
  And does the application need to make any change?
  looks the authentication table has been changed,any action need to do?</p>
  
  <p>many thanks.</p>