Dashboard: Expired token should be HTTP 401, not HTTP 500

[mxey]

Environment

Dashboard version: v1.8.3
Kubernetes version: v1.11.1
Operating system: CentOS Linux release 7.5.1804 (Core)

Steps to reproduce

1. Log in to dashboard and keep the page open
2. Wait/let token expire
3. Refresh page

Observed result

in log:

2018/08/01 13:18:32 MSG_TOKEN_EXPIRED_ERROR
2018/08/01 13:18:32 [2018-08-01T13:18:32Z] Outcoming response to 10.244.18.212:38208 with 500 status code

Expected result

in log:

2018/08/01 13:18:32 MSG_TOKEN_EXPIRED_ERROR
2018/08/01 13:18:32 [2018-08-01T13:18:32Z] Outcoming response to 10.244.18.212:38208 with 401 status code

[jeefy]

/kind bug
/assign

I'll pick this one up! I see where the problem is and it should be fairly straight forward (famous last words) :)

[jeefy]

/close

[mxey]

This seems to still happen with v1.10.0:

2018/12/05 13:13:20 MSG_TOKEN_EXPIRED_ERROR
2018/12/05 13:13:20 [2018-12-05T13:13:20Z] Outcoming response to 10.244.22.126:49022 with 500 status code