Use different memcache servers for sessions and data

Summary:
Actually pull the right variable

Try a sleep command

Log the sleep

Merge branch 'develop' into different-mems

Test Plan: already one stage

Reviewers: #everyone, mclawson

Reviewed By: #everyone, mclawson

Subscribers: mclawson

Differential Revision: https://dev.blendtec.com/D1603