Upgrade to Jackson 2.9.1

Author: bclozel

build.gradle

@@ -47,7 +47,7 @@ configure(allprojects) { project ->
 	ext.groovyVersion        = "2.4.12"
 	ext.hsqldbVersion        = "2.4.0"
 	ext.httpclientVersion    = "4.5.3"
-	ext.jackson2Version      = "2.9.0"
+	ext.jackson2Version      = "2.9.1"
 	ext.javamailVersion      = "1.6.0"
 	ext.jaxbVersion          = "2.2.11"
 	ext.jaxwsVersion         = "2.2.11"