Update onElectedToBeLeader function to register as coordinator and store it's IP address

registration-discovery-leader-reelection-cordinator-workers/src/main/java/Registration_Discovery/OnElectionAction.java

@@ -18,10 +18,17 @@ public class OnElectionAction implements OnElectionCallback {
     }
     @Override
     public void onElectedToBeLeader() {
-        serviceRegistry.unregisterFromCluster();
-        serviceRegistry.registerForUpdates();
-
-        GrpcServerLauncher.start();
+        try {
+            String ipAddress = InetAddress.getLocalHost().getHostAddress();
+            serviceRegistry.unregisterFromCluster();
+            serviceRegistry.registerToClusterAsCoordinator(ipAddress);
+            serviceRegistry.registerForUpdates();
+            GrpcServerLauncher.start();
+        } catch (UnknownHostException e) {
+            throw new RuntimeException(e);
+        } catch (KeeperException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
     }
     @Override
     public void onWorker() {