logrotate: Use copytruncate method by default

logrotate: Use copytruncate method by default

The reopen lograte method has two main problems:
1. It does fail when corosync is not running (solvable by
   adding "|| true")
2. If (for some reason, like SELinux) cfgtool -L fails, logrotate
   fails and corosync keeps logging into old file. Added "|| true"
   makes situation even worse because logrotate removes file but
   corosync keeps logging into it.

Solution is to install copytruncate logrotate snip by default (and
keep reopen config file only for reference).

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>