syslog service should be restarted after hostname is set by net-15-hostname

[Th0masL]

Description
When using SET_HOSTNAME, the new hostname is defined but the Syslog Service does not use the new hostname until the next reboot.

To Reproduce
Start a new VM, use SET_HOSTNAME and then look at the logs in /var/log/syslog, you will see the previous/original hostname.

Expected behavior
The new hostname should be visible in /var/log/syslog as soon as the new hostname is applied by /etc/one-context.d/net-15-hostname.

Details

• Affected Component: addon-context-linux
• Hypervisor: KVM
• Version: 6.0.0.2

Additional context

# cat /var/log/syslog
<.. other lines with old hostname ...>
Oct 12 10:02:55 ubuntu systemd[1]: motd-news.service: Succeeded.
Oct 12 10:02:55 ubuntu systemd[1]: Finished Message of the Day.
### <--- manually running "service syslog restart"
Oct 12 10:04:54 webserver01 systemd[1]: Stopping System Logging Service...
Oct 12 10:04:54 webserver01 rsyslogd: [origin software="rsyslogd" swVersion="8.2001.0" x-pid="858" x-info="https://www.rsyslog.com"] exiting on signal 15.
Oct 12 10:04:54 webserver01 systemd[1]: rsyslog.service: Succeeded.
Oct 12 10:04:54 webserver01 systemd[1]: Stopped System Logging Service.
Oct 12 10:04:54 webserver01 systemd[1]: Starting System Logging Service...

Progress Status

• Branch created
• Code committed to development branch
• Testing - QA
• Documentation
• Release notes - resolved issues, compatibility, known issues
• Code committed to upstream release/hotfix branches
• Documentation committed to upstream release/hotfix branches