upgrade gwt to the latest 2.6.1

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1595968 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 1c241e4..5a51b9c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -57,8 +57,8 @@
         </site>
     </distributionManagement>
     <properties>
-        <gwtVersion>2.6.0</gwtVersion>
-        <gwtMavenVersion>2.6.0</gwtMavenVersion>
+        <gwtVersion>2.6.1</gwtVersion>
+        <gwtMavenVersion>2.6.1</gwtMavenVersion>
         <gwt.moduleSuffix />
         <gwt.logLevel>INFO</gwt.logLevel>
         <jettyVersion>7.3.0.v20110203</jettyVersion>