Integrate metadata logging with Fairing LightGBM

[zhenghuiwang]

/kind feature

Describe the solution you'd like [A clear and concise description of what you want to happen.]

Fairing lightGBM has comprehensive metadata about a training job. It is nice to have integration with lightGBM as the first step of integration with Fairing.

[jtfogarty]

/kind feature /area engprod