Add empty required qualifiers to create valid UNTL.

def find_untl_errors(untl_dict, **kwargs):
    """Add empty required qualifiers to create valid UNTL."""
    fix_errors = kwargs.get('fix_errors', False)
    error_dict = {}
    # Loop through all elements that require qualifiers.
    for element_name in REQUIRES_QUALIFIER:
        # Loop through the existing elements that require qualifers.
        for element in untl_dict.get(element_name, []):
            error_dict[element_name] = 'no_qualifier'
            # If it should be fixed, set an empty qualifier
            # if it doesn't have one.
            if fix_errors:
                element.setdefault('qualifier', '')
    # Combine the error dict and UNTL dict into a dict.
    found_data = {
        'untl_dict': untl_dict,
        'error_dict': error_dict,
    }
    return found_data