Use syslog:syslog for Ubuntu

In Fuel, all syslog templates are for root:root. But
run_user:run_group should be syslog:syslog for Ubuntu.

poke ci
Closes-bug: #1308684

Change-Id: I099560f22b409cf60a6c565af8a1ab13bac48a7c
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Use syslog:syslog for Ubuntu" into stable/5.0