Unqualified properties causing execution to fail

[asdaraujo]

It seems that commit 0526f52 introduced some unqualified variables that are causing the execution to fail with the following error:

TASK [cloudera_deploy : Check Supplied terraform_base_dir variable] ************
task path: /runner/project/cloudera-deploy/roles/cloudera_deploy/tasks/init.yml:232

fatal: [localhost]: FAILED! => {
    "msg": "The conditional check 'infra_deployment_engine == 'terraform'' failed. The error was: error while evaluating conditional (infra_deployment_engine == 'terraform'): 'infra_deployment_engine' is undefined\n\nThe error appears to be in '/runner/project/cloudera-deploy/roles/cloudera_deploy/tasks/init.yml': line 232, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Check Supplied terraform_base_dir variable\n  ^ here\n"
}