Update unit tests to HostStyle.
Update unit tests to HostStyle.

[#160507050](https://www.pivotaltracker.com/story/show/160507050)

Signed-off-by: Dale Wick <188d987a4b971a1fecf708bf002a3b94c86c96a2@pivotal.io>
Co-authored-by: Dale Wick <188d987a4b971a1fecf708bf002a3b94c86c96a2@pivotal.io>

pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli