swagger-client: Remove noAuth

[whs]

The /openapi/v2 endpoint is protected by authentication. Also reported by one of my downstream user on wongnai/kube-slack#50

I'm not sure why this call was flagged with noAuth?

[gordlea]

I'm getting an error that this PR fixes:

 Error: Failed to get /openapi/v2 and /swagger.json: Cannot find module './auth-providers/openid.js'
    at _getSpec.catch.then.catch.err (/Users/johlea/.nvm/versions/node/v8.13.0/lib/node_modules/@opendns/strln-k8-env/node_modules/kubernetes-client/lib/swagger-client.js:56:15)
    at <anonymous>
    at runMicrotasksCallback (internal/process/next_tick.js:122:5)
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickCallback (internal/process/next_tick.js:181:9)

I think the Cannot find module error is misleading, all of the files are there, and this PR fixes the issue for me.

Can we get this merged soon?

[silasbw]

@ajpauwels can you help reconcile this with #372 ?

[whs]

I tested /openapi/v2 and it does not requires authentication in GKE. However, in my cluster that use Kops it does require authentication. It might be due to different API server flag.

Edit: I've confirm I have --anonymous-auth=false set in my cluster. GKE seems to have anonymous auth permanently enabled. Maybe they want to call /healthz?

From what I see the reason authentication was removed was due to #371 as the user pass invalid credential to the library and get a server error. I think this is entirely user's error as it is a documented behavior.

[silasbw]

Thanks @whs 💯 .

Published your fix with kubernetes-client@6.8.1.