Currently, a lot of test results in Maloo are reported with "Client distro: CentOS 7.0", when they are actually CentOS7.7 or 7.8.

This appears to caused by the preference for /etc/os-release, which only reports "Version: 7 (Core)", while /etc/centos-release reports "CentOS 7.7.1908 (Core)" and should be used instead I think.