Add api root cli params

[eric-eclecticiq]

Add --public and --id params to the CLI opentaxii-add-api-root.

Example: opentaxii-add-api-root -t Title --public --id 7468eafb-585d-402e-b6b9-49fe76492f9e

Motivation:

• Public: No need to provide auth
• Id: Provide an ID manually to also reuse it later in a script to add collections

[saaj]

You can do the following, if you want to keep validation/type conversion to argparse. Note that the parse would return actual UUID, so you'd need to covert it back if the underlying API expects a UUID string.

    parser.add_argument(
        "-i",
        "--id",
        type=uuid.UUID,
        required=False,
        help="The UUID to assign else a UUID4 is generated",
    )