Bug 2067064

Created attachment 1867696 [details]
View of RoleBinding when starting (same view as shown in the initial state via oc command)

Description of problem:

Having a `RoleBinding` within a project like the one below.

> $ oc get rolebinding admin -o json
> {
>     "apiVersion": "rbac.authorization.k8s.io/v1",
>     "kind": "RoleBinding",
>     "metadata": {
>         "creationTimestamp": "2022-03-14T07:44:51Z",
>         "name": "admin",
>         "namespace": "project-200",
>         "resourceVersion": "42748833",
>         "uid": "1bf265f5-3499-40b3-93f0-1e2794874633"
>     },
>     "roleRef": {
>         "apiGroup": "rbac.authorization.k8s.io",
>         "kind": "ClusterRole",
>         "name": "admin"
>     },
>     "subjects": [
>         {
>             "apiGroup": "rbac.authorization.k8s.io",
>             "kind": "User",
>             "name": "system:admin"
>         },
>         {
>             "apiGroup": "rbac.authorization.k8s.io",
>             "kind": "User",
>             "name": "user1"
>         },
>         {
>             "apiGroup": "rbac.authorization.k8s.io",
>             "kind": "User",
>             "name": "user2"
>         },
>         {
>             "apiGroup": "rbac.authorization.k8s.io",
>             "kind": "User",
>             "name": "user3"
>         }
>     ]
> }

When editing this in https://<openshift-console-url>/project-details/ns/project-200/access and replacing `user3` with `user4` it drops all `subjects` except the one that has been edited (meaning `user4` will remain available and the rest is removed).

So after modification is done, the `RoleBinding` looks as following:

> $ oc get rolebinding admin -o json
> {
>     "apiVersion": "rbac.authorization.k8s.io/v1",
>     "kind": "RoleBinding",
>     "metadata": {
>         "creationTimestamp": "2022-03-14T07:44:51Z",
>         "name": "admin",
>         "namespace": "project-200",
>         "resourceVersion": "42751278",
>         "uid": "1bf265f5-3499-40b3-93f0-1e2794874633"
>     },
>     "roleRef": {
>         "apiGroup": "rbac.authorization.k8s.io",
>         "kind": "ClusterRole",
>         "name": "admin"
>     },
>     "subjects": [
>         {
>             "apiGroup": "rbac.authorization.k8s.io",
>             "kind": "User",
>             "name": "user4"
>         }
>     ]
> }

Attached are the ScreenShot taken from the Console, showing the changes done that lead to the above outcome.

Version-Release number of selected component (if applicable):

 - OpenShift Container Platform 4.9.23

How reproducible:

 - Always

Steps to Reproduce:
1. Create a `RoleBinding` with multiple `subjects`
2. Edit the `RoleBinding` in the Developer Console
3. Validate the `RoleBinding` that shows all `subjects` dropped expected the one modified

Actual results:

All `subjects` in the `RoleBinding` are dropped expected for the one that was modified

Expected results:

All `subjects` to remain in place and only the `subject` modified to be changed 

Additional info: