Tweak id's to test against pg-mvt renderer
Tweak id's to test against pg-mvt renderer

Actually, the ID's are not generated by ST_AsMVT. They appear as an
artifact of testing, when using toGeoJSONSync (implemented in mapnik).

CartoDB/Windshaft-cartodb,CartoDB/Windshaft-cartodb,CartoDB/Windshaft-cartodb,CartoDB/Windshaft-cartodb