Optimize Pow op for caffe (#721)

* fixed split bug

* fixed concat bug

* fixed node_name bugs

* fixed node_name bugs

* fixed CI bugs

* Interpolate for dynamic

* fixed for CI

* fixed for codestyle

* Optimize pow op

* fixed for code style

* fixed for code style

x2paddle/op_mapper/caffe2paddle/caffe_op_mapper.py

@@ -966,11 +966,12 @@ class CaffeOpMapper():
             inputs={"x": input.name},
             outputs=[node.layer_name],
             **layer_attrs)
-        self.paddle_graph.add_layer(
-            "paddle.pow",
-            inputs={"x": node.layer_name},
-            outputs=[node.layer_name],
-            exponent=params.power)
+        if params.power != 1:
+            self.paddle_graph.add_layer(
+                "paddle.pow",
+                inputs={"x": node.layer_name,
+                        "y": params.power},
+                outputs=[node.layer_name])
 
     def Reduction(self, node):
         assert len(