Use ADMIN role

samples/employee-service/src/main/java/io/spring/sample/graphql/SalaryService.java

@@ -11,7 +11,7 @@ import java.math.BigDecimal;
 public class SalaryService {
 
 
-    @PreAuthorize("hasRole('MANAGER')")
+    @PreAuthorize("hasRole('ADMIN')")
     public Mono<BigDecimal> getSalaryForEmployee(Employee employee) {
         return Mono.just(new BigDecimal("42"));
     }

samples/employee-service/src/test/java/io/spring/sample/graphql/EmployeeServiceApplicationTest.java

@@ -13,6 +13,8 @@ import org.springframework.web.reactive.function.client.ExchangeFilterFunctions;
 
 import java.util.Collections;
 
+import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.mockUser;
+
 @SpringBootTest()
 class EmployeeServiceApplicationTest {
 
@@ -76,8 +78,8 @@ class EmployeeServiceApplicationTest {
     }
 
     @Test
-    @WithMockUser(roles = "MANAGER")
-    void canQuerySalaryAsManager() {
+    @WithMockUser("hasRole('ADMIN')")
+    void canQuerySalaryAsAdmin() {
         String query = "{" +
                 "  employees{ " +
                 "    name" +