Fix the amount of workers spawned for non proxies

We were running as auto so swift would spawn a lot of processes
consuming memory and CPU which are not really neeeded in a devstack env
(and bad for the jenkins vm).

Closes-Bug: 1259548
Change-Id: I6b5266186168fe99568dda5453b436c2f9cfedb3
Merge "Fix the amount of workers spawned for non proxies"