updated examples to add error listener to tickerUsage

Author: kssujithcj

sample/src/Examples.java

@@ -419,6 +419,19 @@ public void onOrderUpdate(Order order) {
             }
         });
 
+        /** Set error listener to listen to errors.*/
+        tickerProvider.setOnErrorListener(new OnError() {
+            @Override
+            public void onError(Exception exception) {
+                //handle here.
+            }
+
+            @Override
+            public void onError(KiteException kiteException) {
+                //handle here.
+            }
+        });
+
         tickerProvider.setOnTickerArrivalListener(new OnTicks() {
             @Override
             public void onTicks(ArrayList<Tick> ticks) {