Minor improvements.

Signed-off-by: Cristiano Urban <cristiano.urban@inaf.it>

transfer_service/cleaner.py

@@ -47,10 +47,12 @@ for row in fileList:
             basePaths.append(basePath)
 
 for basePath in basePaths:
-    for root, dir, files in os.walk(basePath, topdown = False):
-        if root != basePath and not os.listdir(root):
-            os.rmdir(root)
-            print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") + ' ' + root)
+    for root, dirs, files in os.walk(basePath, topdown = False):
+        for dir in dirs:
+            dirPath = os.path.abspath(root) + '/' + dir
+            if not os.listdir(dirPath):
+                os.rmdir(dirPath)
+                print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") + ' ' + dirPath)
 
 # 1) delete files and update the db
 # 2) check for empty dirs and delete them if different from rootPath