dynamic validation (#1621)

* dynamic validation

* small fixes

spring-boot/src/main/java/com/baeldung/dynamicvalidation/DynamicValidationApp.java

@@ -0,0 +1,15 @@
+package com.baeldung.dynamicvalidation;
+
+import javax.annotation.security.RolesAllowed;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DynamicValidationApp {
+    @RolesAllowed("*")
+    public static void main(String[] args) {
+        System.setProperty("security.basic.enabled", "false");
+        SpringApplication.run(DynamicValidationApp.class, args);
+    }
+}