Admin API: Setting Scenario States

[CanYumusak]

No description provided.

[tomakehurst]

Hi, thanks for this.

A few things this could probably do with:

• Support in the client class (WireMock), both static and instance.
• Acceptance tests that exercise this through the client (again, static and instance)
• Consider using PUT rather than POST, identifying the scenario in the URL and therefore avoiding the need for the ScenarioState class.

[tomakehurst]

I intend to create a combined solution for the single scenario reset and set use cases.