Add conditional update for concurrency control
Add conditional update for concurrency control. Expose entity tag (or equivalent) so that conditional update could be made using If_Match and If_NotMatch parameters. Add parameter overwrite: "Whether the upload should overwrite any existing"
others changes:
- python version required >= 3.7 (was >=3.6), harmonizing with all others wdms libs
- version incremented to "1.0.0"
- specify type (blob instance) returned by the upload method
- add some attributes to the blob model class, specifically etag
- Local file system implementation updated accordingly (conditional upload not supported)
- Improvement in Local file system implementation to support virtual folder
Edited by Yannick