RemoteDataProvider

[yava-ua]

Suggested changes:

• Fix ui suggestion when response contains numbers

• In RemoteDataProvider added parameter xpath to search for appropriate collection (if response is convertible to json).
  Xpath format: "some/0/field" where 0 - is an index.

E.g.
When xpath="entries" response below will suggest only entries

{
  "page": {
    "start": 1,
    "total": 10
  },
  "entries": [
    { "name": "Eddard", "house": "Stark" },
    { "name": "Robert", "house": "Baratheon" }
  ]
}