Adjustments for testing Minimal-VM and MicroOS Images in TW Stagings

[Vogtinator]

This PR contains various changes to allow testing the new Staging-MicroOS-Image-ContainerHost and Staging-JeOS-for-kvm-and-xen flavors.

Currently there are several failures, which will be fixed in the product soon:

• [X] docker is available in stagings but missing in the MicroOS DVD, so image_docker and container_diff fail
• [X] The JeOS container_* tests need docker, podman and podman-cni-config on the staging DVD
• [X] prjconf_excluded_rpms fails because NetworkManager-branding was missing in staging projects
• [X] snapper_jeos_cli needs zsh on the staging DVD
• [X] glibc_locale fails because live-langset-data thinks that Tumbleweed 1 is < 15.x: https://build.opensuse.org/request/show/1035815
• [X] kiwi_templates needs kiwi-templates-Minimal on the staging DVD
• [X] cifs needs nmap, but for weird reasons. I changed the code to avoid that.

Verification runs:

• MicroOS: https://openqa.opensuse.org/tests/overview?distri=microos&version=Staging%3AH&build=H.57.2&groupid=38
• JeOS: https://openqa.opensuse.org/tests/overview?distri=opensuse&version=Staging%3AH&build=H.5.1&groupid=38