PARQUET-1621: [C++] Add encrypted parquet files to apache parquet-testing repository (#7)

* Add encrypted parquet files to apache parquet-testing repository

* Update README.md

Add encryption keys and explanation to data/README.md

* Update README.md

Additional fixes to encrypted files section.
7 files changed
tree: 0ad5dd3b36096509035fa4e854dc4518fabb88d3
  1. LICENSE.txt
  2. README.md
  3. bad_data/
  4. data/
README.md

Testing Data and Utilities for Apache Parquet