SW-382: Replace Python2 integer division (/) with Python3 one (//)

lib/feedback.py

@@ -53,7 +53,7 @@ class Feedback():
 
     # determine duration in ISO format (couldn't find a nice lib for it)
     def __convert_timedelta_to_iso(self, td):
-        y,w,d,h,m,s = td.days/365, (td.days/7)%365, (td.days/7)%7, td.seconds/3600, (td.seconds/60)%60, td.seconds%60
+        y,w,d,h,m,s = td.days//365, (td.days//7)%365, (td.days//7)%7, td.seconds//3600, (td.seconds//60)%60, td.seconds%60
         duration = 'P{}Y{}M{}DT{}H{}M{}S'.format(y,w,d,h,m,s)
         return duration