net/filter-rewriter: destroy g_hash_table in colo_rewriter_cleanup

s->connection_track_table forgot to destroy in colo_rewriter_cleanup. Fix it.

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c
index dc3c27a..e063a81 100644
--- a/net/filter-rewriter.c
+++ b/net/filter-rewriter.c
@@ -381,6 +381,8 @@
         filter_rewriter_flush(nf);
         g_free(s->incoming_queue);
     }
+
+    g_hash_table_destroy(s->connection_track_table);
 }
 
 static void colo_rewriter_setup(NetFilterState *nf, Error **errp)