[JIRA] (OVIRT-1831) Make `global-setup.sh` check if packages are installed before trying to install them

[Barak Korren (oVirt JIRA)]

     [ https://ovirt-jira.atlassian.net/browse/OVIRT-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Barak Korren updated OVIRT-1831:
--------------------------------
    Epic Link: OVIRT-400

> Make `global-setup.sh` check if packages are installed before trying to install them
> ------------------------------------------------------------------------------------
>
>                 Key: OVIRT-1831
>                 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1831
>             Project: oVirt - virtualization made easy
>          Issue Type: Improvement
>          Components: oVirt CI
>            Reporter: Barak Korren
>            Assignee: infra
>
> The way '{{global-setup.sh}}' works currently is that it tries to install all the packages it needs in a single yum command and then runs in a loop and checks if the packages were installed properly.
> If the packages are already installed this takes a negligible amount of time on CentOS slaves, but on Fedora it seems to take much longer and as much as 2 minutes.
> We should try to make '{{global-setup.sh}}' faster by making it not try to install packages before checking if they are there, but instead check first and only try to install the missing ones.
> Note that if we'll install multiple packages in a single command, we'll still need to verify they were properly installed after the yum/dnf command finishes.



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