Moving to Tuscany 2.0-M5.1 which has fixes for supporting GAE

git-svn-id: https://svn.apache.org/repos/asf/incubator/photark/trunk@1024105 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 3f837ed..e62aa28 100644
--- a/pom.xml
+++ b/pom.xml
@@ -89,7 +89,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <tuscany.version>2.0-M5</tuscany.version>
+        <tuscany.version>2.0-M5.1</tuscany.version>
     </properties>