Change PTv2 value of name= tag on bus routes

[Minh_Nguyen (Minh Nguyễn)]

The choice of destinations in name would be a moot point under this proposal:

Proposal: Use description instead of name for route relations

I have started a new proposal: that the name tag should be restricted to the same meaning for route relations that it has on other elements and that the description tag should be used otherwise. https://wiki.openstreetmap.org/wiki/Proposal:Use_description_instead_of_name_for_route_relations