RFR: 7006: CoreLibs: Review TPL info in all archives [v2]

[Guru Hb]

> 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"

Guru Hb has updated the pull request incrementally with one additional commit since the last revision:

  Updated correct Bundle-version

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/294/files
  - new: https://git.openjdk.java.net/jmc/pull/294/files/bc76dcb5..f4f8e510

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=294&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=294&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/294.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/294/head:pull/294

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