Implement download_to_string in pithos client
The download_to_string method downloads a remote object from pithos into astring, which is then returned.
Also, implemented unit and functional tests. Changelog is updated
Refs: #3608
Adjust pithos livetest to use container_info_cache
Refs: #3707
Update unitest to include container_info_cache
Refs: 3707
Add a container_infor_cache param to upload_object
Each upload involves a request that retrieves block size and hash information.In higher level applications, this request is redudant after the first upload.This feature allows higher level operations to cache retrieved container info...
Update livetest for upload return modification
Refs: #3656
Modify upload methods to return created obj info
Methods affected: upload_object upload_object_unchunked upload_object_by_manifestation
unittests modified accordingly
Implement livetest for image unregister
Refs: #3728
Expose image-unregister to cli and unittest it
Implement image unregister in kamaki.clients
Make kamaki.clients unware of kamaki.logger
use logging for getting the loggers
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