make JavaTorInstaller not final

Author: zeroleak

java/src/main/java/com/msopentech/thali/java/toronionproxy/JavaTorInstaller.java

@@ -39,7 +39,7 @@
 
  </pre>
  */
-public final class JavaTorInstaller extends TorInstaller {
+public class JavaTorInstaller extends TorInstaller {
 
     private static final Logger LOG = LoggerFactory.getLogger(JavaTorInstaller.class);