wrong tag tunnel_name

Hi,

i found a lot of tunnel_name in Japan and i think we should use correct “tunnel:name”.
I can do this in a single edit, but only if this is OK for the local mapper.

Currenty there are only 3 ways with this tag. As “tunnel_name” is incorrect, I think it’s ok to change them all to “tunnel:name”

Hi,
I changed all tunnel_name and bridge_name in Japan some months ago after contacting talk_ja.

Changesets:
http://www.openstreetmap.org/changeset/41434218
http://www.openstreetmap.org/changeset/41435132