Unify logging configs for syslog logging, use stderr for default logging

All openstack services logging logic were inified:
- There are stdout logging related bugs exist in openstack services, thus
  as a workaround, stderr logging should be used for non syslog mode
- Log config for stdout logging provided as well but now configured to be used
- Because of some issues with logdir/log_dir logfile/log_file typos, use both as well

TODO fix init scripts to redirect stderr and
to not use explicit logfile/logdir/logconfig in daemon launch string

Implements (partially): #FUEL-835

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>