Cleanup and consolidate APNs for providers using Telenor NO network

 * Remove "Telenor MMS" - Was merged into "Telenor" in a previous patch
 * Rename Ludo to Ventelo - Ludo doesn't exist anymore
 * Merge "Mobitalk Internet" and "Mobitalk MMS" into a single APN

Change-Id: I77ff06d6c8d6021cd1887468bbeb7ac9315e68bb