Add end-to-end testing for Bot Framework with NLU.DevOps

[rozele]

With the upcoming changes to NLU.DevOps.ModelPerformace, we'll be able to support arbitrary testing of JSON results from NLU. We should add a providers, NLU.DevOps.BotService, that supports both direct line via BotFramework and direct line speech via the Cognitive Service Speech SDK. The scenario would be as follows, consider the following tests:

[
  {
      "text": "add two avocados to my cart",
      "conversationID": 1,
      "userID": 1,
      "attachments": [
        [
           {
              "name": "avocado",
              "quantity": 2
           }
        ]
      ]
  },
  {
      "text": "remove one avocado and add two dozen eggs",
      "conversationID": 1,
      "userID": 1,
      "attachments": [
        [
           {
              "name": "avocado",
              "quantity": 1
           },
           {
              "name": "12 eggs",
              "quantity": "2"
           }
        ]
      ]
  }
]

In this case, we will set up the direct line channel to the bot and send two user queries "add two avocados to my cart" and "remove one avocado and add two dozen eggs".

The output may not contain any LUIS or other NLU provider specific info, but instead focuses on the end state contained in the activity.