Bug fixes for Trips downloads and DB update

Summary:
Fix bug from downloading gtfs trip info from Mato

Try to fix problem of closed db connection

Test Plan: Check that the map doesn't crashes

Reviewers: valerio.bozzolan

Reviewed By: valerio.bozzolan

Subscribers: valerio.bozzolan, Libre BusTO

Tags: Libre BusTO

Differential Revision: https://gitpull.it/D118