[REST] SweepDetail result not really respectful of JSON

[coinwalletdev]

SweepDetail API can return multiple keys with the same name (trytes). It should return an array of trytes instead.

See RFC7159 'The names within an object SHOULD be unique'

This is annoying as for example, the code given in the documentation:

var request = require('request');

var command = {
    "command": "SweepDetail",
    "bundleHash" : "EWLCW9FFLSBUGZZOOLFQLTRJFKNGPUVCIOCQYTSDOSZLBCBJIIJZGPALGAKKANBTDYOBVQFOJHA9OVFOY"
}

var options = {
  url: 'http://localhost:50051',
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-IOTA-API-Version': '1'
  },
  json: command
};

request(options, function (error, response, data) {
  if (!error && response.statusCode == 200) {
    console.log(data);
  }
});

won't reply all the trytes for some bundleHash.

edit: same goes for tailHash it seems