Added serial console for Ubuntu and Centos.

Change-Id: Ic484fa214b19e4fb1f4ffff8df1e718bf8132dd9
Closed-bug: #1259245
Merge "Added serial console for Ubuntu and Centos."
Use log_config_append instead of log_config

log_config is deprecated since Havana.

Depends on Oslo rfc syslog fix and log_config_append
should be used in Fuel only with use_syslog_rfc_format
option, thus it should be first pupulated to all
OpenStack core-services.

Closes-bug: #1263660

Change-Id: Iee7452392dd2db2ec2ad42aa8a203f0086aa6e60
Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>