Upgrade to Hibernate Validator 5.3 (as well as Log4J 2.7, Protobuf 3.1, Tomcat 8.5.6)

Issue: SPR-13965

Author: jhoeller

build.gradle

@@ -49,7 +49,7 @@ configure(allprojects) { project ->
 	ext.gsonVersion            = "2.7"
 	ext.hamcrestVersion        = "1.3"
 	ext.hibernate5Version      = "5.2.3.Final"
-	ext.hibval5Version         = "5.3.0.CR1"
+	ext.hibval5Version         = "5.3.0.Final"
 	ext.hsqldbVersion          = "2.3.4"
 	ext.httpasyncVersion       = "4.1.2"
 	ext.httpclientVersion      = "4.5.2"
@@ -69,12 +69,12 @@ configure(allprojects) { project ->
 	ext.junitVersion           = "4.12"
 	ext.junitJupiterVersion    = '5.0.0-M2'
 	ext.junitPlatformVersion   = '1.0.0-M2'
-	ext.log4jVersion           = '2.6.2'
+	ext.log4jVersion           = '2.7'
 	ext.nettyVersion           = "4.1.5.Final"
 	ext.okhttpVersion          = "2.7.5"
 	ext.okhttp3Version         = "3.4.1"
 	ext.poiVersion             = "3.15"
-	ext.protobufVersion        = "3.0.2"
+	ext.protobufVersion        = "3.1.0"
 	ext.quartzVersion          = "2.2.3"
 	ext.reactivestreamsVersion = "1.0.0"
 	ext.reactorVersion         = "2.0.8.RELEASE"
@@ -90,7 +90,7 @@ configure(allprojects) { project ->
 	ext.snifferVersion         = "1.15"
 	ext.testngVersion          = "6.9.12"
 	ext.tiles3Version          = "3.0.5"
-	ext.tomcatVersion          = "8.5.5"
+	ext.tomcatVersion          = "8.5.6"
 	ext.tyrusVersion           = "1.13"
 	ext.undertowVersion        = "1.4.3.Final"
 	ext.websocketVersion       = "1.1"