Update P2 repository to kepler

Author: kiritsuku

pom.xml

@@ -219,7 +219,7 @@
     <repository>
       <id>helios</id>
       <layout>p2</layout>
-      <url>http://download.eclipse.org/releases/indigo</url>
+      <url>http://download.eclipse.org/releases/kepler</url>
     </repository>
     <repository>
       <id>codehaus-snapshots</id>