[BUG] CentOS7 Pre-requisites not installed.

This quote from the initial cron task says it all..

Database Backup: roundcube --> /backup/mysql/daily//roundcube.sql
warning: /var/tmp/rpm-tmp.0wIwYe: Header V4 DSA/SHA1 Signature, key ID cd2efdxx: NOKEY
error: Failed dependencies:
perl(DBD::mysql) >= 1.0 is needed by percona-toolkit-2.2.16-1.noarch

Yet:

Package perl-DBD-MySQL-4.023-6.el7.x86_64 already installed and latest version

Could it be that the initial cron.daily is run too soon?

As an aside: months on, from when it was reported the path is still uncorrected (//).