Updating license to Apache 2.0 (Arrow code)

[argmarco-tkd]

Updating license to Apache 2.0 in new external encryption related files (#112)

Methodology

• Used the following grep expressions to find files which needed to be updated (Arrow repo)
  • grep -ri "what license" *
  • grep -fi "figure out" * | grep license
  • grep -ri "todo" * | grep -i license
  • grep -ri 112 *
• Searched manually the parquet/encryption/external directory.

Once files were located, the Apache 2.0 license was added.

Testing

• No functionality was changed, however we still ran existing tests via ctest -L parquet (which passed)

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on GitHub? https://github.com/apache/arrow/issues/new/choose

Opening GitHub issues ahead of time contributes to the Openness of the Apache Arrow project.

Then could you also rename the pull request title in the following format?

GH-${GITHUB_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

or

MINOR: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - Contributing Overview