RFR: 7006: CoreLibs: Review TPL info in all archives

Fri Jul 30 13:50:54 UTC 2021

On Fri, 30 Jul 2021 13:45:35 GMT, Guru Hb <ghb at openjdk.org> wrote:

> 1. Updated Licenses.txt with BSD attribute + third party readme with correct attribute. 
> 2. Re-structured "writer" with its "test" as a separate module in "tests" 
> 3. Added missing Copyright attributes in some of the "java source files"

@reinhapa do review the core library changes and provide your review comments.

-------------

PR: https://git.openjdk.java.net/jmc/pull/294