Use dns cluster info from lib common get function

[averdagu]

Openshift coreDNS creates the domain name using an string located in dnses.operator.openshift.io. This string can change in the future, calling lib-common/GetDNSClusterDomain the responsability of gathering this information correctly only falls under lib-common intead of all operators.

Resolves: OSPRH-3627
Depends-on: openstack-k8s-operators/lib-common#580

[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/365a372e01ba4e0a82dc3fbf33fed4ca

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 54m 44s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 23m 59s
✔️ telemetry-operator-multinode-autoscaling-tempest SUCCESS in 1h 16m 25s
❌ telemetry-operator-multinode-default-telemetry FAILURE in 1h 08m 37s
✔️ functional-tests-on-osp18 SUCCESS in 1h 36m 06s (non-voting)
✔️ functional-logging-tests-osp18 SUCCESS in 1h 10m 26s (non-voting)
✔️ functional-graphing-tests-osp18 SUCCESS in 1h 10m 25s (non-voting)
✔️ functional-metric-verification-tests-osp18 SUCCESS in 1h 12m 40s (non-voting)

[jlarriba]

/retest

[jlarriba]

recheck

[jlarriba]

/retest

Get "https://quay.rdoproject.org/v2/": dial tcp 38.129.56.158:443: i/o timeout

[vyzigold]

/lgtm

[openshift-ci]

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