Description of problem:
In OSP13, swift has number of workers set to number of cores for all its services like swift-proxy-server, swift-account-server, swift-container-server, swift-object-server.
On a 56 cores machines, we have 57 swift-proxy-server processes for example.
Ideally we should cap workers at min(cpu-cores/2, 12)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. deploy director with defaults
Too many swift processes
Max of 12 swift workers