Let the rerun formatter includes all scenarios when the background fails (v2.0)

Given that all scenarios are reported as failed when the background fails in the 2.0 branch (see [spec](https://github.com/cucumber/cucumber/blob/master/features/docs/gherkin/background.feature#L280)), it would seem that the rerun formatter would work as intended in this case and include all scenarios when the background fail. Curiously enough that is not the case, the rerun formatter will not include any scenario when the background fails, its like the formatter only get to know that the unique part of the scenarios were all skipped.

One solution to this is to let the rerun formatter include also skipped feature elements (like in v1.3.x, see #654), but is it the right solution?