GetNames--ref from way vs ref from relations

(2016-03-29T14:48:46Z) @gknisely : originally created valhalla/mjolnir#432

We need to revisit the GetNames logic in osmway. If the ref from the way != ref from relations, should we add it to the list? Currently, the ref from relations is always added over the ref that is set on the way or in the ref_offset_map. See names test for examples.

@dgearhart