Add XGBoost Reproducibility Documentation

Description

Add a section in the documentation about reproducing XGBoost models just like we have for H2O GBM models: http://docs.h2o.ai/h2o/latest-stable/h2o-docs/data-science/gbm-faq/reproducibility.html

Your pinned fields
Click on the next to a field label to start pinning.

Assignee

New H2O Bugs

Reporter

Megan Kurka