SLING-5786 Update Groovy to 2.4.7

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1748415 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 839f0a5..138e0b2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,7 +35,7 @@
   <description>Support for scripting with Groovy</description>
 
   <properties>
-    <groovy.version>2.4.6</groovy.version>
+    <groovy.version>2.4.7</groovy.version>
   </properties>
 
   <scm>