configure verifier output returned under stderr when successful

[Simon Wright]

Running "rally verify configure-verifier" returns output under standard error when command is successful.
Following is ansible output running xrally-openstack under podman
        "changed": true,
        "cmd": [
            "sudo",
            "podman",
            "run",
            "--network=host",
            "-v",
            "rally_volume:/home/rally/.rally",
            "localhost/xrally-tripleo:latest",
            "verify",
            "configure-verifier",
            "--id",
            "8c326a22-0ce1-4d40-99c0-0eb1d93f493d",
            "--deployment-id",
            "1fabbef1-3130-473d-98b1-b567da5abcb8"
...
        "failed": false,
        "rc": 0,
        "start": "2022-11-21 09:40:37.629494",
        "stderr": "2022-11-21 09:40:40.478 1 INFO rally.api [-] Configuring verifier 'tempest' (UUID=8c326a22-0ce1-4d40-99c0-0eb1d93f493d) for deployment 'sandpita' (UUID=1fabbef1-3130-473d-98b1-b567da5abcb8).\u001b[00m\n2022-11-21 09:40
:41.922 1 INFO rally.api [-] Verifier 'tempest' (UUID=8c326a22-0ce1-4d40-99c0-0eb1d93f493d) has been successfully configured for deployment 'sandpita' (UUID=1fabbef1-3130-473d-98b1-b567da5abcb8)!\u001b[00m",
        "stderr_lines": [
            "2022-11-21 09:40:40.478 1 INFO rally.api [-] Configuring verifier 'tempest' (UUID=8c326a22-0ce1-4d40-99c0-0eb1d93f493d) for deployment 'sandpita' (UUID=1fabbef1-3130-473d-98b1-b567da5abcb8).\u001b[00m",
            "2022-11-21 09:40:41.922 1 INFO rally.api [-] Verifier 'tempest' (UUID=8c326a22-0ce1-4d40-99c0-0eb1d93f493d) has been successfully configured for deployment 'sandpita' (UUID=1fabbef1-3130-473d-98b1-b567da5abcb8)!\u001b[00m"
        ],
        "stdout": "",
        "stdout_lines": [],

Also tried this on the command line, again with podman xrally-openstack, which
confirms this goes to stderr not stdout. Unable to check this outside container.

Rally version: 3.3.0
Installed Plugins:
        rally-openstack: 2.2.1.dev18