Updating apache parent pom version to latest

git-svn-id: https://svn.apache.org/repos/asf/synapse/trunk@1776520 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/java/pom.xml b/java/pom.xml
index b93603c..ff08f71 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -27,7 +27,7 @@
     <parent>
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
-        <version>9</version>
+        <version>18</version>
     </parent>
 
     <groupId>org.apache.synapse</groupId>