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

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