fix typo for attention

configs/rec/rec_mv3_tps_bilstm_att.yml

 Global:
-  use_gpu: true
+  use_gpu: True
   epoch_num: 72
   log_smooth_window: 20
   print_batch_step: 10
@@ -65,7 +65,7 @@ Metric:
 
 Train:
   dataset:
-    name: LMDBDateSet
+    name: LMDBDataSet
     data_dir: ../training/
     transforms:
       - DecodeImage: # load image
@@ -84,7 +84,7 @@ Train:
 
 Eval:
   dataset:
-    name: LMDBDateSet
+    name: LMDBDataSet
     data_dir: ../validation/
     transforms:
       - DecodeImage: # load image

configs/rec/rec_mv3_tps_bilstm_ctc.yml

 Global:
-  use_gpu: true
+  use_gpu: True
   epoch_num: 72
   log_smooth_window: 20
   print_batch_step: 10

configs/rec/rec_r34_vd_tps_bilstm_att.yml

 Global:
-  use_gpu: true
+  use_gpu: True
   epoch_num: 400
   log_smooth_window: 20
   print_batch_step: 10
@@ -64,7 +64,7 @@ Metric:
 
 Train:
   dataset:
-    name: LMDBDateSet
+    name: LMDBDataSet
     data_dir: ../training/
     transforms:
       - DecodeImage: # load image
@@ -83,7 +83,7 @@ Train:
 
 Eval:
   dataset:
-    name: LMDBDateSet
+    name: LMDBDataSet
     data_dir: ../validation/
     transforms:
       - DecodeImage: # load image