Select with bucket_id specified leads to map-reduce #220
Description
See full repro (cartridge app, insert.lua, loader.lua) attached.
Long story short:
crud.select('space_1', {{'==', 'secondary', 's_test_1'}}, { bucket_id = vshard.router.bucket_id_mpcrc32('s_test_1' )})
leads to map-reduce. I can see it in box.stat of both shards, and it starts throwing errors if I monkeypatch _G._crud.select_on_storage on one of the shards.
crud 0.8.0