bug fixed for multi-version different classloader error. for issue 616.

alibaba#616

src/main/java/com/alibaba/fastjson/serializer/ASMSerializerFactory.java

@@ -33,7 +33,7 @@
 
 public class ASMSerializerFactory implements Opcodes {
 
-    protected final ASMClassLoader classLoader             = new ASMClassLoader();
+    protected final ASMClassLoader classLoader             = new ASMClassLoader(ASMSerializerFactory.class.getClassLoader());
 
     private final AtomicLong       seed                    = new AtomicLong();