[CHEF-3774] - fixes for chef-client debian init.d script

* Add 1 second sleep on chef-client start to allow pid file to get
  created
* Inspect `/proc/PID/cmdline` instead of `status` to get full daemon name
  instead of ruby process as the name
* Use daemon name (`/usr/bin/chef-client`) instead of
  name (`chef-client`) to match the return from above inspection

The above works on an Ubuntu 12.04 system.