Updates for burrow v3 version of api schema.

[jbanton-dm]

This could use some refactoring, but it at least makes it work with newer versions of burrow that no longer support the v2 api.

[jrpilat]

Below this line:
offsets += [latest_offset]

[lenfree]

hi @jrpilat , unfortunately we're still on Kafka v2. Do you mind sharing an example json body what this looks like in v3 to help us confirm if this would break v2 or not.. Thanks!

[carsonoid]

@lenfree is this what you need?

curl -s http://localhost:8000/v3/kafka/default/consumer/test | jq .

{
  "error": false,
  "message": "consumer detail returned",
  "topics": {
    "Maker": [
      {
        "offsets": [
          {
            "offset": 247136,
            "timestamp": 1571187859717,
            "lag": 432
          },
          {
            "offset": 247175,
            "timestamp": 1571187860801,
            "lag": 393
          },
          {
            "offset": 247203,
            "timestamp": 1571187861806,
            "lag": 365
          },
          {
            "offset": 247254,
            "timestamp": 1571187862816,
            "lag": 314
          },
          {
            "offset": 247285,
            "timestamp": 1571187863866,
            "lag": 283
          },
          {
            "offset": 247323,
            "timestamp": 1571187865134,
            "lag": 245
          },
          {
            "offset": 247378,
            "timestamp": 1571187866144,
            "lag": 190
          },
          {
            "offset": 247438,
            "timestamp": 1571187867176,
            "lag": 130
          },
          {
            "offset": 247462,
            "timestamp": 1571187868263,
            "lag": 106
          },
          {
            "offset": 247492,
            "timestamp": 1571187869406,
            "lag": 76
          },
          {
            "offset": 247504,
            "timestamp": 1571187871205,
            "lag": 64
          },
          {
            "offset": 247516,
            "timestamp": 1571187872322,
            "lag": 52
          },
          {
            "offset": 247556,
            "timestamp": 1571187873389,
            "lag": 12
          },
          {
            "offset": 247566,
            "timestamp": 1571187875598,
            "lag": 2
          },
          {
            "offset": 247568,
            "timestamp": 1571187978098,
            "lag": 0
          }
        ],
        "owner": "",
        "client_id": "",
        "current-lag": 0
      }
    ]
  },
  "request": {
    "url": "/v3/kafka/default/consumer/test",
    "host": "757320aea5d7"
  }
}