fix import error

deploy/hubserving/ocr_cls/module.py

@@ -7,7 +7,7 @@ import os
 import sys
 sys.path.insert(0, ".")
 import copy
-
+import paddlehub
 from paddlehub.common.logger import logger
 from paddlehub.module.module import moduleinfo, runnable, serving
 import cv2

deploy/hubserving/ocr_det/module.py

@@ -8,7 +8,7 @@ import sys
 sys.path.insert(0, ".")
 
 import copy
-
+import paddlehub
 from paddlehub.common.logger import logger
 from paddlehub.module.module import moduleinfo, runnable, serving
 import cv2

deploy/hubserving/ocr_rec/module.py

@@ -7,7 +7,7 @@ import os
 import sys
 sys.path.insert(0, ".")
 import copy
-
+import paddlehub
 from paddlehub.common.logger import logger
 from paddlehub.module.module import moduleinfo, runnable, serving
 import cv2

deploy/hubserving/ocr_system/module.py

@@ -9,7 +9,7 @@ sys.path.insert(0, ".")
 import copy
 
 import time
-
+import paddlehub
 from paddlehub.common.logger import logger
 from paddlehub.module.module import moduleinfo, runnable, serving
 import cv2