title: Error : When createRole command used in mongodb
body: <p>Running following query on admin collection gives an error.</p>
  
  <pre><code>db.runCommand({
      createRole:"mynew",
      priviliges : [..],
      roles: [
      { role: "read", db: "admin" }
    ],
    writeConcern: { w: "majority" , wtimeout: 5000 }
  })
  </code></pre>
  
  <p><strong>showing "error msg:no such cmd createRole"</strong></p>