core(debug): hard to distinguish related log at multi-instance env

Submitted by Eunhae Choi

This is for debug env.

When we do debug with log message, it is hard to recoginize which element/object is included in which pipeline in multi-instance environment.

We've added family-id for grouping for each pipeline at downstream (I've attached the patch).

To get better idea and make it public, I registered this bug.
Please share your idea and suggest better solution.

Thank you.