Create GrpcServerLauncher class which run spring app and grpc server

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

+package Registration_Discovery;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GrpcServerLauncher {
+    public static void start() {
+        SpringApplication.run(GrpcServerLauncher.class);
+        System.out.println("Starting..........");
+    }
+}