Rename JSR 303 Validator bean name

Closes gh-8481

Author: snicoll

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.java

@@ -46,7 +46,7 @@ public class ValidationAutoConfiguration {
 	@Bean
 	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
 	@ConditionalOnMissingBean
-	public static Validator validator() {
+	public static Validator jsr303Validator() {
 		LocalValidatorFactoryBean factoryBean = new LocalValidatorFactoryBean();
 		MessageInterpolatorFactory interpolatorFactory = new MessageInterpolatorFactory();
 		factoryBean.setMessageInterpolator(interpolatorFactory.getObject());