Fix comments in logrotation templates

W/o this fix, some log files at Openstack nodes cannot be rotated at the
hourly schedule and /var/log could end up having no free space while
waiting for the next daily based rotation schedule.

Closes-bug: #1393495

Change-Id: I192ebbd31f83fb264307c1c2f1e17a74cec933b3
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Fix comments in logrotation templates" into stable/5.1