[build][minor] Add missing licenses

[yew1eb]

No description provided.

[StephanEwen]

Thanks, good addition.
Have you checked whether the shell scripts still work now, or whether they get confused by the headers?

If all works, can you remove the exclusions from the RAT checks (root pom.xml) for these files, so that the presence of headers is checked in the future?

[yew1eb]

@StephanEwen, I see, we need a script to automatically check the headers licenses.
I will think about how to implement this script...

[StephanEwen]

We already have a script, it is the RAT plugin: https://github.com/apache/flink/blob/master/pom.xml#L957

You only need to make sure that these files are not excluded from the check...

[yew1eb]

thx, OIC, I have updated this PR. :)

[yew1eb]

@StephanEwen ping

[greghogan]

Adding the license to browserconfig.xml looks fine, but why change the user configurations masters, slaves, and zoo.cfg? Are these even copyrightable?

[StephanEwen]

The masters and slaves file probably does not need a license header (although the rules of when you need one and when not are not very clear to me).

I think config files frequently have a license header, so I would take the zoo.cfg change.

@yew1eb Are you okay if we merge this without the changes to masters and slaves?

[yew1eb]

@StephanEwen, @greghogan , I'm sorry to reply late, a little busy recently.

Stephan, I agree with you.

This PR has been updated.

[greghogan]

+1

[zentol]

merging.