Parametrize OOD domain in apache rewrite rules on ood-knightly

In the Apache config on ood-knightly, the canonical name in the apache rewrite rules was set to rc.uab.edu because the variable ood_domain_name value was set to rc.uab.edu. Therefore, we're presented with the prod OOD dashboard instead of the knightly OOD. We need to change the value via extra_vars in the pipeline to point to knightly.rc.uab.edu during the deploy time.