Rework how we setup logging for Crowbar [1/3]

There are three main changes:

* instead of putting stdout/stderr in `production.log`, we put them in `production.out`.
* we really use production.log to log things, instead of using syslog which loses the formatting and spams `/var/log/messages`.
* instead of putting the chef-client logs for each node in `/opt/dell/crowbar_framework/log`, we put them in `/var/log/crowbar/chef-client`

The rationale for using syslog was "distributed setups", but since we
put the logs of chef-client runs in /opt/dell/crowbar_framework anyway,
I don't think this rationale stands.

Crowbar-Pull-ID: b381b3bca3dd6482b6c462570095828859ba5a08

Crowbar-Release: pebbles