* Update the s3 post functionality to better support success_action_redirect
- Add the bucket/key values to the redirect url like s3 does, which
supports code that relies on the key value being there on the
redirect.
- Add support for replacing ${filename} in the key value with the actual
filename from the form upload.
See Issue #3667
* Update s3 tests for changed success_action_redirect behavior
- Adds a new test called test_s3_server_post_to_bucket_redirect that
tests both the ${filename} replacement and the key/value addition to the
redirect query args
- Updated the test_creating_presigned_post checks to handle the
key/value additions to the redirect url.
* Fix test updates to work with python2.7
- remove f-string usage
- fix urllib.parse imports to use six
Co-authored-by: Wynn Wilkes <wynn@leading2lean.com>
ETag metadata key is being returned as "Etag" instead of "ETag". This leads to issues in some AWS SDKs using MotoServer. This change fixes the issue by updating the key to the correct format.
This closes#920
