OpenShift custom OAuth support

[bsharrow]

Search for "metadata.uid" field to support JSON responses from OpenShift's user API.

When adding OpenShift as a custom OAuth provider, the following error message is output:

Exception while invoking method 'login' Error: Service data for service openshift must include id

OpenShift's identity endpoint (/oapi/v1/users/~) returns the following:

{
    "kind": "User",
    "apiVersion": "v1",
    "metadata": {
        "name": "<USERNAME>",
        "selfLink": "/oapi/v1/users/<USERNAME>",
        "uid": "55c68f17-41d5-11e9-a0d2-005056a00a29",  // *this is the user ID
        "resourceVersion": "21557",
        "creationTimestamp": "2019-03-08T19:06:53Z"
    },
    "fullName": "<REDACTED>",
    "identities": [
        "LDAP:<USERNAME>"
    ],
    "groups": [
        "system:authenticated",
        "system:authenticated:oauth"
    ]
}

This fix provides compatibility with OpenShift's OAuth server.

[geekgonecrazy]

above 🔝

[geekgonecrazy]

Thanks! 🙏