Accept Merge Request #696: (feature/修改机床参数bug -> develop)

Merge Request: 修改coding代码扫描警告

Created By: @龚启豪
Reviewed By: @马广威
Approved By: @马广威 
Accepted By: @龚启豪
URL: https://jikimo-hn.coding.net/p/jikimo_sfs/d/jikimo_sf/git/merge/696?initial=true

sf_manufacturing/models/mrp_workorder.py

@@ -616,7 +616,7 @@ class CNCprocessing(models.Model):
         logging.info('folder_name:%s' % folder_name)
         serverdir = os.path.join('/tmp', folder_name, 'return', processing_panel)
         logging.info('serverdir:%s' % serverdir)
-        for root, dirs, files in os.walk(serverdir):
+        for root, files in os.walk(serverdir):
             for f in files:
                 logging.info('f:%s' % f)
                 if os.path.splitext(f)[1] == ".pdf":