Added @SpringBootApplication

provider/register-gcp/src/main/java/org/opengroup/osdu/register/provider/gcp/RegisterApplication.java

 package org.opengroup.osdu.register.provider.gcp;
 
 import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.ComponentScan;
 
 import javax.annotation.PostConstruct;
 
 @ComponentScan({"org.opengroup.osdu"})
+@SpringBootApplication
 public class RegisterApplication {
     @PostConstruct
     void f() {