FIX: prevents a circular json error in tests (PR #14738)

The flow goes from:

  • getting current user object
  • creating a POJO using some of the current user keys
  • passing this POJO around, which end up being used in message bus
  • the processing fn associated ens up doing User.create on this object will both create a User object, but also inject store in it, store is holding a reference to currentUser Object and…

BOOM, we have an object holding a reference to the same object, which JSON.stringify used in prepareBody of pretender doesn’t like.