[HIVEMALL-294] Fix XGboost to report progress report for each iteration

[HIVEMALL-294] Fix XGboost to report progress report for each iteration

## What changes were proposed in this pull request?

Fix XGboost to report progress report for each iteration.

## What type of PR is it?

Improvement, Hot Fix

## What is the Jira issue?

https://issues.apache.org/jira/browse/HIVEMALL-294

## How was this patch tested?

unit tests

## Checklist

- [x] Did you apply source code formatter, i.e., `./bin/format_code.sh`, for your commit?
- [ ] Did you run system tests on Hive (or Spark)?

Author: Makoto Yui <myui@apache.org>

Closes #228 from myui/HIVEMALL-294.