Fix dev mode in Openfire.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/branches@8792 b35dd754-fafc-0310-a699-88a17e54d16e

3_3_1_branch/src/java/org/jivesoftware/openfire/container/PluginServlet.java

@@ -441,6 +441,8 @@ public class PluginServlet extends HttpServlet {
             jspc.setOutputDir(compilationDir.getAbsolutePath());
             jspc.setClassName(filename);
             jspc.setCompile(true);
+            jspc.setCompilerSourceVM("1.5");
+            jspc.setCompilerTargetVM("1.5");
 
             jspc.setClassPath(getClasspathForPlugin(plugin));
             try {