Observe function set with ObserveMocks() overwritten in api tests with reports

[enrico5b1b4]

When setting an observe function with ObserveMocks() and running an apitest with a reporter, the observe function is not called.
Failing test scenario detailed below

func TestMocks_ApiTest_SupportsObservingMocksWithReport(t *testing.T) {
	var observedMocks []*mockInteraction
	reporter := &RecorderCaptor{}
	observeMocksCalled := false

	getUser := NewMock().
		Get("http://localhost:8080").
		RespondWith().
		Status(http.StatusOK).
		Body("1").
		Times(2).
		End()

	getPreferences := NewMock().
		Get("http://localhost:8080").
		RespondWith().
		Status(http.StatusOK).
		Body("2").
		End()

	New().
		Report(reporter).
		ObserveMocks(func(res *http.Response, req *http.Request, a *APITest) {
			observeMocksCalled = true
			if res == nil || req == nil || a == nil {
				t.Fatal("expected request and response to be defined")
			}
			observedMocks = append(observedMocks, &mockInteraction{response: res, request: req})
		}).
		Mocks(getUser, getPreferences).
		Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			bytes1 := getUserData()
			bytes2 := getUserData()
			bytes3 := getUserData()

			w.Write(bytes1)
			w.Write(bytes2)
			w.Write(bytes3)
			w.WriteHeader(http.StatusOK)
		})).
		Get("/").
		Expect(t).
		Status(http.StatusOK).
		Body(`112`).
		End()

	assert.Equal(t, 3, len(observedMocks))
	assert.True(t, observeMocksCalled)
}

[steinfletcher]

Thanks for the bug report @enrico5b1b4