pep8 blank lines fixes

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

modules/colisprive/pages.py

@@ -26,6 +26,7 @@ def update_status(p, status):
     if p.status < status:
         p.status = status
 
+
 class TrackPage(Page):
     def get_info(self, _id):
         p = Parcel(_id)
@@ -70,5 +71,6 @@ class TrackPage(Page):
             pass
         return p
 
+
 class ErrorPage(Page):
     pass