This change adds a new fact that can be used as the default values for
any worker configuration. When used this fact will reduce the number of
default workers configured for services. Previously we were using
$::processorcount which could lead to excessive memory consumption or
connection limits being execeeded when services were deployed on
baremetal with large number of processors. The os_workers fact uses the
larger of two following values, '2' or '# processors / 4' but will not
exceed '8'.
Change-Id: Ia588817fde9203a134bc9eaad9a5bd5453d7639a
1b6c0a7272