Fix for SyslogUdpHandler timezone issue
Fix for SyslogUdpHandler timezone issue

Hello!
As described in [this issue](https://github.com/Seldaek/monolog/issues/1350), SyslogUdpHandler doesn't respect `Logger` timezone setting for IETF (RFC-5424) syslog format.
This PR is a fix for this issue.
Seldaek/monolog,pomaxa/monolog