group_vars/all not read by setup.sh if the inventory outside the installer directory

Issue

• While upgrading to 2.3, the playbook failed with the following message:

  "The conditional check 'ansible_version.full is version_compare(minimum_ansible_version, '<')' failed. The error was: error while evaluating conditional (ansible_version.full is version_compare(minimum_ansible_version, '<')): 'minimum_ansible_version' is undefined. 'minimum_ansible_version' is undefined"
  

  The variable that is needed (minimum_ansible_version) is available in group_vars/all but is not loaded when running setup.sh when inventory is outside the installer directory.