Add type exclude for 3rd party @ConfigurationProperties pojo

[snicoll]

When we bind a class that we don't manage as a @ConfigurationProperties, the generated meta-data will contain any valid property. There are a few annoying cases such as setClassLoader or setLogWriter (accepting a PrintWriter).

Maybe we should have a list of types that we know we can't bind and therefore exclude such properties from the generated meta-data

[philwebb]

Seems sensible to me. I've assigned to 1.2.0 but it's not urgent.

[snicoll]

I will do it today.

[snicoll]

@philwebb I have hard-coded a list but there are still a few cases that are annoying (flyway callbacks for instance). Maybe we should open that up so that users can put a file with excluded types at a given location? Too complicated?

My current fix seems a bit naive to me, let me know if you have an idea to improve that in time for 1.2. Thanks!

[philwebb]

I don't think there is any need to make it any more complicated at the moment. I've extracted the logic to a new class so that we can extend it easily in the future if needed.

[philwebb]

are still a few cases that are annoying

If you have a list we should just chuck them in.