pom.xml: update Hibernate Validator to 5.3.6.Final

Changelogs:
- http://in.relation.to/2016/01/18/hibernate-validator-530-alpha1-out/
- http://in.relation.to/2016/09/05/hibernate-validator-530-cr1-out/
- http://in.relation.to/2016/10/11/hibernate-validator-530-final-out/
- http://in.relation.to/2016/10/27/hibernate-validator-531-final-out/
- http://in.relation.to/2016/11/10/hibernate-validator-532-final-out/
- http://in.relation.to/2016/11/22/hibernate-validator-533-final-out/
- http://in.relation.to/2016/12/08/hibernate-validator-540-beta1-and-534-final-out/
- https://hibernate.atlassian.net/browse/HV-1284?jql=project %3D HV AND fixVersion in (5.3.5.Final) ORDER BY updated
- https://hibernate.atlassian.net/browse/HV-1498?jql=project %3D HV AND fixVersion in (5.3.6.Final) ORDER BY updated
- https://developer.jboss.org/wiki/HibernateValidatorMigrationGuide#jive_content_id_53x

No functional changes.

Author: php-coder

pom.xml

@@ -496,7 +496,7 @@
 		<hamcrest.version>1.3</hamcrest.version>
 
 		<!-- Redefine default value from spring-boot-dependencies (https://github.com/spring-projects/spring-boot/blob/v1.5.14.RELEASE/spring-boot-dependencies/pom.xml) -->
-		<hibernate-validator.version>5.2.5.Final</hibernate-validator.version>
+		<hibernate-validator.version>5.3.6.Final</hibernate-validator.version>
 
 		<!-- Redefine default value from spring-boot-dependencies (https://github.com/spring-projects/spring-boot/blob/v1.5.14.RELEASE/spring-boot-dependencies/pom.xml) -->
 		<htmlunit.version>2.21</htmlunit.version>