[Imports] Proposed import cleanup: Olympic peninsula streams

[Paul Norman]

The Olympic peninsula has a a few imports from the US NFS and NPS

I'm proposing cleaning them up with a mechanical edit that for streams 
from the NFS

- Removes attribution=US-NFS, fixme=resurvey, import_uuid, length, 
length_unit, llid, and waterway_llid tags
- Changes 
source=http://www.fs.fed.us/r6/data-library/gis/olympic/hydronet_meta.htm to 
source=US NFS
- Removes name=No Name
- Simplifies them with JOSM, set to 2.5m threshold

For paths from the US NPS

- Removes attribution=US-NPS, fixme=resurvey, import_uuid, length, 
length_unit, NPS:*, US-NPS:* tags
- Changes source=US-NPS_import_... to source=US NPS
- Simplifies them with JOSM, set to 2.5m threshold

It's worth noting that the streams were originally imported in a 
reversed direction, but this has been fixed and downstream is now the