Continuation of #328: Call recycle on the response object once we're done with it.

 When testing 8000 connections, this reduces the count of *Chunk instances from the 300K count to the low 20Ks.

Author: rlubke

Diff for: providers/grizzly/src/main/java/org/asynchttpclient/providers/grizzly/filters/AsyncHttpClientEventFilter.java

@@ -19,6 +19,7 @@
 import org.glassfish.grizzly.http.HttpClientFilter;
 import org.glassfish.grizzly.http.HttpContent;
 import org.glassfish.grizzly.http.HttpHeader;
+import org.glassfish.grizzly.http.HttpResponsePacket;
 
 import java.io.IOException;
 
@@ -81,7 +82,11 @@ protected void onHttpHeadersParsed(HttpHeader httpHeader, FilterChainContext ctx
 
     @Override
     protected boolean onHttpPacketParsed(HttpHeader httpHeader, FilterChainContext ctx) {
-        return eventHandler.onHttpPacketParsed(httpHeader, ctx);
+        boolean result = eventHandler.onHttpPacketParsed(httpHeader, ctx);
+//        HttpResponsePacket response = (HttpResponsePacket) httpHeader;
+//        response.getRequest().setExpectContent(false);
+//        response.recycle();
+        return result;
     }
 
     @Override