Add filename to err msg when we can't stat of file

Helps customer better troubleshoot the problem.
Fix unit test on windows
Merge branch 'print-stat-err-filename' into develop

* print-stat-err-filename:
  Fix unit test on windows
  Add filename to err msg when we can't stat of file
Re-add cbacc26c58b1d4c196f715727b6647dcd7a13cb1 (doc example fix)

Looks like this was accidently reintroduced.  We do *not*
automatically use multipart uploads in the low level ``s3api`` commands,
you need to use the high level ``s3`` commands to get that behavior.
Merge branch 'EronHennessey-doc-example-updates' into develop

* EronHennessey-doc-example-updates:
  Re-add cbacc26c58b1d4c196f715727b6647dcd7a13cb1 (doc example fix)
  example updates from the doc team
Fixes for previous update