[DISCUSSION][MENTORS] License of JSXTransformer.js

[Ning Wang <wa...@gmail.com>]

Hi,

The last known license issue in Heron is the JSXTransformer.js file. The
issue is tracked here:
https://github.com/apache/incubator-heron/pull/3437/files

The JS file contains many functions and each function has different
copyrights and licenses, including Apache, BSD (2/3) and MIT.

I prepared a PR (https://github.com/apache/incubator-heron/pull/3437/files)
to solve the problem to meet the requirements. Basically, JSXTransformer is
added under multiple licenses in the LICENSE file, and corresponding
license text files are added in the licenses folder.

The questions are:
- Is this the right way?
- Is there anything we need to do?

This license issue is a major blocker for graduation. Any suggestions would
be greatly appreciated!

--ning