After HADOOP-9565 adds a marker interface for blobstores, move s3 & s3n into their own hadoop-amazon library
- keeps the S3 dependencies out of the standard hadoop client dependency graph.
- lets people switch this for alternative implementations.
feature #2 would let you swap over to another s3n impl (e.g. amazon's) without rebuilding everything
- is depended upon by
HADOOP-10400 Incorporate new S3A FileSystem implementation
- relates to
HADOOP-11444 Jets3tFileSystemStore fails to remove initial slash from object keys, resulting in objects with double forward slashes being stored