Missing defaults in ansible-tests

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

Author: kopecmartin

container-images/tcib/base/ansible-tests/run_ansible.sh

@@ -3,6 +3,10 @@
 set -euo pipefail
 
 ANSIBLE_DIR="/var/lib/ansible/ansible"
+ANSIBLE_FILE_EXTRA_VARS_PARAM="${ANSIBLE_FILE_EXTRA_VARS_PARAM:-}"
+POD_ANSIBLE_PLAYBOOK="${POD_ANSIBLE_PLAYBOOK:-}"
+POD_ANSIBLE_EXTRA_VARS="${POD_ANSIBLE_EXTRA_VARS:-}"
+POD_ANSIBLE_GIT_REPO="${POD_ANSIBLE_GIT_REPO:-}"
 
 # Check and set ansible debug verbosity
 ANSIBLE_DEBUG=""