added missing class

ribbon-core/src/main/java/com/netflix/client/http/HttpUtils.java

+package com.netflix.client.http;
+
+import java.io.IOException;
+
+import com.netflix.serialization.ContentTypeBasedSerializerKey;
+import com.netflix.serialization.Deserializer;
+import com.netflix.serialization.SerializationFactory;
+import com.netflix.serialization.TypeDef;
+
+public class HttpUtils {
+
+    public static <T> T getEntity(HttpResponse response, TypeDef<T> type, Deserializer deserializer) throws IOException {
+        return deserializer.deserialize(response.getInputStream(), type);
+    }
+    
+    public static <T> T getEntity(HttpResponse response, TypeDef<T> type, 
+            SerializationFactory<ContentTypeBasedSerializerKey> serializationFactory) throws IOException {
+        String contentType = response.getHttpHeaders().getFirst("Content-Type");
+        Deserializer deserializer = serializationFactory.getDeserializer(new ContentTypeBasedSerializerKey(contentType, type));
+        return deserializer.deserialize(response.getInputStream(), type);
+    }
+}