Upgrade to Gradle 3.4 final (and Hibernate ORM 5.2.8)

Issue: SPR-15207

Author: jhoeller

build.gradle

@@ -50,7 +50,7 @@ configure(allprojects) { project ->
 	ext.groovyVersion          = "2.4.8"
 	ext.gsonVersion            = "2.8.0"
 	ext.hamcrestVersion        = "1.3"
-	ext.hibernate5Version      = "5.2.7.Final"
+	ext.hibernate5Version      = "5.2.8.Final"
 	ext.hibval5Version         = "5.4.0.Final"
 	ext.hsqldbVersion          = "2.3.4"
 	ext.httpasyncVersion       = "4.1.3"
@@ -1467,7 +1467,7 @@ configure(rootProject) {
 
 	task wrapper(type: Wrapper) {
 		description = "Generates gradlew[.bat] scripts"
-		gradleVersion = '3.3'
+		gradleVersion = '3.4'
 
 		doLast() {
 			def gradleOpts = "-XX:MaxMetaspaceSize=1024m -Xmx1024m"

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
-#Wed Feb 08 08:27:32 CST 2017
+#Mon Feb 20 21:56:40 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.4-rc-2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.4-bin.zip