deleteDocument API doesn't delete all the matching items

[cddude229]

Test:

    "Support deleting more than 10 docs" in {
      val insertFutures = (0 to 11).map(i => restClient.index(index, tpe, Document(s"doc$i", Map("text7" -> "here7"))))
      val ir = Future.sequence(insertFutures)
      Await.result(ir, 10.seconds)
      refresh()

      val delFut = restClient.deleteDocument(index, tpe, new QueryRoot(MatchAll))
      Await.result(delFut, 10.seconds)
      refresh()

      val count = Await.result(restClient.count(index, tpe, new QueryRoot(MatchAll)), 10.seconds)
      count should be (0)
    }

Failure mode:

- should Support deleting more than 10 docs *** FAILED ***
  2 was not equal to 0 (RestlasticSearchClientTest.scala:314)

[cddude229]

Ok, so, I just remembered the fromOpt / sizeOpt options on QueryRoot, so that helps. However, the API still won't delete everything if it matches more than the maximum value of sizeOpt (10k I think)