Description of problem:

I work with multiple clusters where my username is the same. If I `oc login` into one of them, a kubeconfig context is generated that looks like this:

```
- context:
 cluster: api-ci-openshift-org:443
 namespace: ci
 user: alvaroaleman
```

The newly generated user named `alvaroaleman` has no cluster identifier attached. This means that if I log into another cluster where my user is also named `alvaroaleman`, this context will stop working.

This is a huge UX issue and used to not be the case in an earlier version of `oc` (4.3 something?)


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

$ oc version
Client Version: openshift-clients-4.5.0-202006231303.p0-4-gb66f2d3a6
Server Version: 4.4.11
Kubernetes Version: v1.17.1+166b070



How reproducible: 100%


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: