inject TCP RST test pass

src/ip_reassembly/ip_reassembly.cpp

@@ -729,6 +729,7 @@ static struct packet *ip_frag_reassemble(struct ip_reassembly *assy, struct ip_f
 
     // create a new packet
     packet_parse(pkt, ptr, packet_len);
+    packet_set_origin_ctx(pkt, NULL);
 
     return pkt;