Adjust maximum kubernetes scaling time to 20 minutes.

In some cases, where the cluster itself needs to scale out and
add additional workers, this portion of the work can take 10
minutes on its own, separate from finally being able to
schedule and deploy the cluster on those new workers.

Author: brett19

utils/caocontrol/controller.go

@@ -996,7 +996,7 @@ func (c *Controller) waitCouchbaseClusterAvailable(
 		}
 
 		return true, nil
-	}, 10*time.Minute)
+	}, 20*time.Minute)
 	if err != nil {
 		return errors.Wrap(err, "failed to wait for couchbase cluster")
 	}