Refactored a portion of apiAiApp tests.
Refactored a portion of apiAiApp tests.

1. Refactored the apiAiApp#getDeviceLocation
  * Created a function to populate body with sample deviceLocation.
  * Simplified it() into 2 it()s.
2. Refactored ApiAiApp#getTransactionRequirementResult.
  * Removed duplicate JSON body, and added the relevant transaction info
  as a funciton.
3. Refactored ApiAiApp#getDeliveryAddress.
  * Removed duplicate JSON body.
4. Refactored ApiAiApp#getTransactionDecision,
ApiApp#getUserConfirmation.
  * Removed duplicate JSON body.
5. ApiAiApp#getDateTime, ApiAiApp#getSignInStatus,
ApiAiApp#askForTransactionRequirements, ApiAiApp#askForDeliveryAddress,
ApiAiApp#askForTransactionDecision, ApiAiApp#askForConfirmation,
ApiAiApp#askForDateTime, ApiAiApp#askForSignIn,
ApiAiApp#isPermissionGranted, ApiAiApp#isInSandbox, ApiAiApp#getIntent.
  * Removed duplicate JSON body.

Change-Id: If9ccbf083857a864d60f41dea019e9e1e428ab43

actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs