Upgrade to Netty 4.1.4

Author: jhoeller

build.gradle

@@ -61,7 +61,7 @@ configure(allprojects) { project ->
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
 	ext.log4jVersion         = "1.2.17"
-	ext.nettyVersion         = "4.1.3.Final"
+	ext.nettyVersion         = "4.1.4.Final"
 	ext.okhttpVersion        = "2.7.5"
 	ext.okhttp3Version       = "3.4.1"
 	ext.openjpaVersion       = "2.4.1"