0515 fix ssr (#4630)

* update api 1.8

* fix ssr infer

PaddleRec/ssr/infer.py

@@ -40,13 +40,13 @@ def model(vocab_size, emb_size, hidden_size):
     user_data = fluid.data(
         name="user", shape=[None, 1], dtype="int64", lod_level=1)
     all_item_data = fluid.data(
-        name="all_item", shape=[None, vocab_size, 1], dtype="int64")
+        name="all_item", shape=[None, vocab_size], dtype="int64")
 
     user_emb = fluid.embedding(
         input=user_data, size=[vocab_size, emb_size], param_attr="emb.item")
     all_item_emb = fluid.embedding(
         input=all_item_data, size=[vocab_size, emb_size], param_attr="emb.item")
-    all_item_emb_re = all_item_emb
+    all_item_emb_re = fluid.layers.reshape(x=all_item_emb, shape=[-1, emb_size])
 
     user_encoder = net.GrnnEncoder(hidden_size=hidden_size)
     user_enc = user_encoder.forward(user_emb)
@@ -94,7 +94,7 @@ def infer(args, vocab_size, test_reader):
                     user_data, pos_label = utils.infer_data(data, place)
                     all_item_numpy = np.tile(
                         np.arange(vocab_size), len(pos_label)).reshape(
-                            len(pos_label), vocab_size, 1).astype("int64")
+                            len(pos_label), vocab_size).astype("int64")
                     para = exe.run(copy_program,
                                    feed={
                                        "user": user_data,