Merge pull request #7494 from izeye:validation

* pr/7494:
  Add ValidationAutoConfiguration to spring.factories

spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -88,6 +88,7 @@ org.springframework.boot.autoconfigure.solr.SolrAutoConfiguration,\
 org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration,\
 org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,\
 org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,\
+org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\
 org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration,\
 org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration,\
 org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration,\