Look into penalizing walking a bit more for Multimodal routes

[gknisely]

Instead of waiting for a bus or train we will sometimes walk excessively. Please see
mapzen/eraser-map#828

Changing use_bus = 1.0 does fix this issue
37.42013,-122.13588
37.44473,-122.16245

[dgearhart]

Example route: https://github.com/valhalla/valhalla/blob/master/test_requests/nyc_transit_routes.txt#L5
Walking too far at origin - from 25th st down to 14th st

Example route: https://github.com/valhalla/valhalla/blob/master/test_requests/nyc_transit_routes.txt#L9
Walking too far at origin and dest

[gknisely]

Using onestops from TL. This appears to have the same issue. s-c29r8y86wy-southboundyaleathodgins to s-c29r8ehemw-southboundvedderatelder