Update Axiom version.

git-svn-id: https://svn.apache.org/repos/asf/axis/axis2/java/rampart/trunk@1725084 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 08e8b4b..a000849 100644
--- a/pom.xml
+++ b/pom.xml
@@ -605,7 +605,7 @@
 
     <properties>
         <axis2.version>1.7.0-SNAPSHOT</axis2.version>
-        <axiom.version>1.2.17-SNAPSHOT</axiom.version>
+        <axiom.version>1.2.18-SNAPSHOT</axiom.version>
 
         <wss4j.version>1.6.16</wss4j.version>
         <opensaml.version>2.5.1-1</opensaml.version>