Comment 3 for bug 1349601

The root cause is conflicting configuration artifacts shipped with mysql5.6 packages.
Once I deleted /etc/mysql/conf.d/{my5.6.cnf,mysqld_safe_syslog.cnf} and /etc/mysql/my.cnf and restarted mysql service, the logs appeared in syslog.
Redirecting to OSCI team, because of the issue is packaging related.