[SPARK-15008][ML][PYSPARK] Add integration test for OneVsRest

## What changes were proposed in this pull request?

1. Add `_transfer_param_map_to/from_java` for OneVsRest;

2. Add `_compare_params` in ml/tests.py to help compare params.

3. Add `test_onevsrest` as the integration test for OneVsRest.

## How was this patch tested?

Python unit test.

Author: yinxusen <yinxusen@gmail.com>

Closes #12875 from yinxusen/SPARK-15008.