{
    "auth": {
        "tenantId": "demo",
        "passwordCredentials": {
            "userId": "demo",
            "password": "secretsecret"
        }
    }
}

{
    "auth": {
        "tenantName": "demo",
        "passwordCredentials": {
            "username": "demo",
            "password": "secretsecret"
        }
    }
}

Fix identity api v2.0 authentication example
Fix identity api v2.0 authentication example

The sample authentication request for identity api v2.0 uses the keys
"tenantId" and "userId", but the corresponding values are names.
This patch replaces "tenantId" with "tenantName" and "userId" with
"username".

Change-Id: Ie5adfb5a0eaa58517f925d2f3ca0f3fb3cc17d37
