Bump to JGit 4.0.0

Luca Milanesio

2015-06-12 a1cee65c7242f69f7e35978d98cea391095d7225

 src/main/java/com/gitblit/servlet/RawServlet.java

@@ -468,7 +468,7 @@
            served = true;
         }
      } finally {
         tw.release();
         tw.close();
         rw.dispose();
      }