Upgrade Chef to 12.21.31
As a stepping stone to #3020 (closed) (upgrade to chef 13), we should get to the top of the 12 branch first. At time of writing that means moving from chef 12.12.15 to 12.21.31.
As a stepping stone to #3020 (closed) (upgrade to chef 13), we should get to the top of the 12 branch first. At time of writing that means moving from chef 12.12.15 to 12.21.31.