We should provide a script to automatically synchronize downstream bug fix branch (ie, release-1.6.x) with upstream branch (ie, 1.6.0.redhat-8-0-x).

This may need some change in order to move certain files (ie, vendor directory) outside the downstream repo.

Useful docs:

• https://docs.google.com/document/d/1Ux0GhABYmzI0hL20pp_eCOYrK881z0sDQo_TXuMSbR0/edit
• https://docs.google.com/document/d/1Xd0-gkdDI5kfUtiz2qW3Hi1IK6cVFdnbw2AXBoSZ30Y/edit