Move Pod Types from DataType enum to Type enum

paddle/fluid/framework/framework.proto

@@ -91,7 +91,9 @@ message OpProto {
   required string comment = 5;
 }
 
-enum DataType {
+message VarType {
+  enum Type {
+    // Pod Types
     BOOL = 0;
     INT16 = 1;
     INT32 = 2;
@@ -99,19 +101,17 @@ enum DataType {
     FP16 = 4;
     FP32 = 5;
     FP64 = 6;
-}
 
-message VarType {
-  enum Type {
-    LOD_TENSOR = 1;
-    SELECTED_ROWS = 2;
-    FEED_MINIBATCH = 3;
-    FETCH_LIST = 4;
-    STEP_SCOPES = 5;
-    LOD_RANK_TABLE = 6;
-    LOD_TENSOR_ARRAY = 7;
-    PLACE_LIST = 8;
-    READER = 9;
+    // Other types that may need additional descriptions
+    LOD_TENSOR = 7;
+    SELECTED_ROWS = 8;
+    FEED_MINIBATCH = 9;
+    FETCH_LIST = 10;
+    STEP_SCOPES = 11;
+    LOD_RANK_TABLE = 12;
+    LOD_TENSOR_ARRAY = 13;
+    PLACE_LIST = 14;
+    READER = 15;
   }
 
   required Type type = 1;