AllRequestFilter: delegate to the filters for init and destroy phases too

It is not sufficient only to dispatch doFilter() methods. To initialize and
destroy filters, init() and destroy() methods must be honored.

Change-Id: I5b87583a212c4dc854cf205f2a57125b713736cb

gerrit-httpd/src/main/java/com/google/gerrit/httpd/AllRequestFilter.java

@@ -69,10 +69,16 @@ public abstract class AllRequestFilter implements Filter {
 
     @Override
     public void init(FilterConfig config) throws ServletException {
+      for (AllRequestFilter f: filters) {
+        f.init(config);
+      }
     }
 
     @Override
     public void destroy() {
+      for (AllRequestFilter f: filters) {
+        f.destroy();
+      }
     }
   }