panlint: Add option to ignore missing inclusion of components/config

[wpoely86]

Panlint will not issue errors about the missing include for any component in the whitelist.

[wpoely86]

@stdweird have a look

[ned21]

What's the use case for this?

[wpoely86]

I find the Component X in use, but component config has not been included errors not really helpful. Especially with metaconfig. It means including a lot of extra lines and it doesn't say anything about including the schema.

So far I've mostly ignored the message but now we have Jenkins that is not happy because of it. This allows a way to get around it.

[ned21]

"whitelist" is not inclusive language - can you please rename all instances of it in this code? Given that it's really about ignoring a specific test, perhaps --ignore-missing-component-config would be a better name?

Although I also have concerns about this being a special case of a general issue, and a more configuration option would make sense?

[jrha]

Additionally, can you add tests for whatever you implement please.

[ned21]

Looking good - can you please squash the commits and amend the commit message of 7c891c0?