Missing support for auto slicing

[norbson]

In HLRC we can set slices to auto passing 0 as argument:

Params withSlices(int slices) {
  if (slices == 0) {
    // translate to "auto" value in rest request so the receiving end doesn't throw error
      return putParam("slices", AbstractBulkByScrollRequest.AUTO_SLICES_VALUE);
  }
  return putParam("slices", String.valueOf(slices));
        }

There is no such option in new java client:

if (request.slices != null) {
  params.put("slices", String.valueOf(request.slices));
}

[swallez]

This has been fixed in PR #292, backported to version 8.2 in PR #293 and to version 7.17 in PR #294.