Remove alias in tilequeue source lookup for openstreetmapdata.com

[zerebubuth]

We treat openstreetmapdata.com and osmdata.openstreetmap.de the same way when determining a Source for a feature. This helps to guard against using the new code with older RAWR tiles and cached test data, both of which have the value baked-in. I think we should probably leave this in until we've done a few builds and remove it before the 1.8.0 release.

Originally posted by @zerebubuth in tilezen/tilequeue#372

[nvkelso]

See:

• https://github.com/tilezen/tileops/blob/d8fcfa14f5ec15718a4cf0b071de3bc4db966089/docker/meta-batch/config.yaml#L44
• https://github.com/tilezen/tileops/blob/d8fcfa14f5ec15718a4cf0b071de3bc4db966089/docker/rawr-batch/config.yaml#L24

[nvkelso]

@zerebubuth We've had a successful build, time to remove the alias before we cut release?