another uncaught failure in QueryScheduler.spec.js

[Nicolas Riesco]

See https://circleci.com/gh/plotly/falcon-sql-client/3810

  1) QueryScheduler queries a database and updates a plotly grid on an interval:

      AssertionError: expected [ 'Guinea', 'Guinea' ] to deeply equal [ 1 ]
      + expected - actual

       [
      -  "Guinea"
      -  "Guinea"
      +  1
       ]
      
      at test/backend/QueryScheduler.spec.js:261:24
      at <anonymous>
      at process._tickDomainCallback (internal/process/next_tick.js:135:7)