Add required variables for SKMO tests

[HanzJas]

Add required test variables/values which are used as default values for SKMO Horizon tests in horizon.conf

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/1a633ad1868648629b1b4474e8daa87f

✔️ tcib-openstack-meta-content-provider-master SUCCESS in 2h 12m 02s
✔️ tcib-crc-podified-edpm-baremetal-master SUCCESS in 1h 27m 41s
❌ tcib-podified-multinode-edpm-deployment-crc-master FAILURE in 26m 02s

[HanzJas]

recheck , it seems like random failure to me

[abays]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abays, deshipu, HanzJas

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[HanzJas]

/cherry-pick antelope

[openshift-cherrypick-robot]

@HanzJas: new pull request created: #390

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In response to this:

/cherry-pick antelope

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