title: db.fsyncLock() without permission in MongoDB (auth enabled)
body: <p>i have added auth to my MongoDB instance. I created a user with the following command</p>
  
  <pre><code>db.createUser(
   { user: "cocodrile", pwd: "amazonas",
     roles: [
         { role: "userAdminAnyDatabase", db: "admin"},
         { role: "dbOwner", db: "admin"},         
         { role: "dbOwner", db: "brasil_database"}, 
         { role: "dbOwner", db: "usa_database"} ,
         { role: "dbOwner", db: "argentina_database"},
         { role: "dbOwner", db: "test"}] })
  </code></pre>
  
  <p>I want to perform a <strong>db.fsyncLock()</strong> and it says:</p>
  
  <pre><code>db.fsyncLock()
  {
      "ok" : 0,
      "errmsg" : "not authorized on admin to execute command { fsync: 1.0, lock: true }",
      "code" : 13
  }
  </code></pre>
  
  <p>What i am doing wrong?
  Thanks!</p>