Wrong endpoint interface in gnocchi scenarios execution

[Juha Kosonen]

Rally doesn't use the endpoint interface defined in deployment configuration in gnocchi scenarios. Public endpoint is accessed even when the endpoint type is configured as internal in deployment configuration.

versions:
rally (0.11.1)
rally-openstack (1.0.1.dev32)

gnocchi endpoints:
+----------------------------------+-----------+--------------+-------------------+---------+-----------+--------------------------------------------+
| ID | Region | Service Name | Service Type | Enabled | Interface | URL |
+----------------------------------+-----------+--------------+-------------------+---------+-----------+--------------------------------------------+

| 13eb3a7631ff4caeb2dffc71b22d9b37 | regionOne | gnocchi | metric | True | internal | http://192.0.2.88:8041 |
| 3988a998046b41e6bcf363d237d4722a | regionOne | gnocchi | metric | True | public | http://192.168.37.222:8041 |
| 5f9b4048b9814587ac5767a709753d11 | regionOne | gnocchi | metric | True | admin | http://192.0.2.3:8041 |

Environment variable OS_INTERFACE set to 'internal' and deployment created with --fromenv

# rally deployment config
{
    "openstack": {
        "admin": {
            "password": "admin",
            "project_domain_name": "Default",
            "project_name": "admin",
            "user_domain_name": "Default",
            "username": "admin"
        },
        "auth_url": "http://192.168.37.11:5000/v3",
        "endpoint": null,
        "endpoint_type": "internal",
        "https_cacert": "",
        "https_insecure": false,
        "profiler_conn_str": null,
        "profiler_hmac_key": null,
        "region_name": ""
    }
}

# rally task start list-capabilities.yaml
[...]
ConnectionFailure: Unable to establish connection to http://192.168.37.222:8041/v1/capabilities/: HTTPConnectionPool(host='192.168.37.222', port=8041): Max retries exceeded with url: /v1/capabilities/ (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f34a4054510>: Failed to establish a new connection: [Errno 113] No route to host',))
[...]

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/567832

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/567832
Committed: https://git.openstack.org/cgit/openstack/rally-openstack/commit/?id=fa9d863fb0124a3d251f5127277de4f727506ff7
Submitter: Zuul
Branch: master

commit fa9d863fb0124a3d251f5127277de4f727506ff7
Author: Juha Kosonen <email address hidden>
Date: Fri May 11 14:20:33 2018 +0300

    Set endpoint interface to gnocchi client

    The endpoint_type defined in environment specification/deployment
    configuration is the endpoint interface for gnocchi.

    Closes-Bug: #1770593

    Change-Id: Ie83f3568fc764d2f1b11f272cc28e4113c016cb1
    Signed-off-by: Juha Kosonen <email address hidden>