Calibra may fail with ContainerPlatform

[ZDu-IDM]

When run calibration we will encounter this case:

• experiment has parent_id
• experiment has None parent

As the results, platform.get_directory call may fail at this line:

        suite_dir = Path(self.job_directory, self.entity_display_name(item.parent))

in

def get_directory(self, item: Union[Suite, Experiment, Simulation]) -> Path:
    """
    Get item's path.
    Args:
        item: Suite, Experiment, Simulation
    Returns:
        item file directory
    """
    if isinstance(item, Suite):
        item_dir = Path(self.job_directory, self.entity_display_name(item))
    elif isinstance(item, Experiment):
        suite_id = item.parent_id or item.suite_id
        if suite_id is None:
            raise RuntimeError("Experiment missing parent!")
        suite_dir = Path(self.job_directory, self.entity_display_name(item.parent))
        item_dir = Path(suite_dir, self.entity_display_name(item))
    elif isinstance(item, Simulation):
        exp = item.parent
        if exp is None:
            raise RuntimeError("Simulation missing parent!")
        exp_dir = self.get_directory(exp)
        item_dir = Path(exp_dir, self.entity_display_name(item))
    else:
        raise RuntimeError(f"Get directory is not supported for {type(item)} object on FilePlatform")

    return item_dir