Filtering with non existing / declared field is ignored

[HugoPoi]

Bug or feature request

• Bug
• Feature request

Description of feature (or steps to reproduce if bug)

1. Insert 10 rows in a model/table
2. Model.find({where: { nonexistingfield: 'test' } })
3. Return 10

Expected result

Return 0 (Memory connector return 0)
Maybe this should return an error ?

Actual result (if bug)

Return all the documents/rows

Additional information (Node.js version, LoopBack version, etc)

Tested with master of loopback-connector-sqlite3