Collect procstat metrics only for components
Collect procstat metrics only for components

This commit removes config that directs Telegraf to monitor resource
consumption for all processes running on all cluster nodes, which is
often wasteful, because Mesos task metrics are already collected by
other inputs. Instead we provide a whitelist of systemd units to
monitor.

dcos/dcos,dcos/dcos,dcos/dcos,kensipe/dcos,dcos/dcos,kensipe/dcos,kensipe/dcos,dcos/dcos,kensipe/dcos