Stop passing new lanes' "worklist" key to add_lane
Stop passing new lanes' "worklist" key to add_lane

This key is always either None or a Worklist wsme model. Also,
passing None causes the list_id to end up null in the database,
which leads to an integrity error.

Change-Id: I5087064b77fea2a5a59ef7200cfa58e4f8c31925
Story: 2004948
Task: 29363

ColdrickSotK/storyboard,ColdrickSotK/storyboard,ColdrickSotK/storyboard