Upgrade to Hibernate Validator 5.4 beta 1

Issue: SPR-14998

Author: jhoeller

build.gradle

@@ -49,7 +49,7 @@ configure(allprojects) { project ->
 	ext.gsonVersion            = "2.8.0"
 	ext.hamcrestVersion        = "1.3"
 	ext.hibernate5Version      = "5.2.5.Final"
-	ext.hibval5Version         = "5.3.3.Final"
+	ext.hibval5Version         = "5.4.0.Beta1"
 	ext.hsqldbVersion          = "2.3.4"
 	ext.httpasyncVersion       = "4.1.2"
 	ext.httpclientVersion      = "4.5.2"