Change instruments to match the supertest API
Change instruments to match the supertest API

supertest add error as the first parameter of Test#assert() since 1.0.0, so
we find the `response` argument by number of arguments expected by the
shimmed function.

vickvu/supersamples,mehdivk/supersamples,rprieto/supersamples,rprieto/supersamples,GranitB/supersamples,vickvu/supersamples,GranitB/supersamples,mehdivk/supersamples