Implement GET /devices in JS Client Library

[davidraker]

Get routes to all devices for all connected platforms.

In the case where a device with the same topic appears on multiple platforms, the value for that topic in the result will be a list of routes where each element is the route to the device topic on on of the platforms where it appears.

Request:

• Authorization: BEARER <jwt_token>

Response:

• With valid BEARER token on success: 200 OK
  • Content Type: application/json
  • Body:

    {
        "<topic>": "/platform/:platform/devices/:topic",
        "<topic>": [
                    "/platform/:platform/devices/:topic",
                    "/platform/:platform/devices/:topic",
                   ]
        ...
    }
    

• With valid BEARER token on failure: 400 Bad Request
  • Content Type: application/json
  • Body:

    {
        "error": "<Error Message>"
    }
    

• With invalid BEARER token: 401 Unauthorized