Missing defaults in ansible-tests

[kopecmartin]

The run_ansible.sh was missing default values for couple of parameters potentially causing "unbound variable" error.

[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/8e4e0ad3af1543acb7ba6df80802845d

✔️ openstack-meta-content-provider SUCCESS in 2h 50m 44s
✔️ tcib-crc-podified-edpm-baremetal SUCCESS in 1h 25m 37s
❌ tcib-podified-multinode-edpm-deployment-crc FAILURE in 1h 02m 13s

[kopecmartin]

recheck

[lpiwowar]

Looks good to me! 👍

[openshift-ci]

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