* The admin could download restricted bitstreams.

* The user cannot download bitstream if he/she is not signed in.

* Cannot obtain context with user.

* The user is already fetched from the context.

* Added docs.

* Do not use endpoint for downloading the single file because it already exists - remove it.

* Fixed AuthorizationRestControllerIT tests.

* Find bitstream format using mimetype not ID.

* Updated tests according to fix.

* Updated `handle.canonical.prefix` to hdl handle.

* Integration test cannot have changed handle.canonical.prefix.

* The user registration is added when the eperson is created by the ui.

* try using newer checkout, same as upstream, since error is with git

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Co-authored-by: MajoBerger <88670521+MajoBerger@users.noreply.github.com>

* Add logging of downloading restricted bitstreams.

* Log downloading of every bitstream not only restricted ones.

* Added docs

* Refactored logging.

* givenname and last name values are converted to UTF-8 encoding

* Delete eperson in tests