Work in progree: Changed layout of GenericObject::asyncLockfreeFetch so it matches the model of previous sync operations

like ArchiveRequest::asyncUpdateJobOwner().
Also made the no lock management match the model of previously developped nolock operations.
Removed Backend::AsyncLockfreeFetcher::wait() as get() will pass the exceptions anyway.

Make compilation and unit tests pass for checking.

the Backend.

The generic objects will then be fetched lockfree in parallel, sorted from their memory copy in the sorter,

and then processed.

The probe state is also used. It represents the time when the drive is being checked
for tapes during the down to up transition.

Shutdown is not in use yet as it requires changing the behaviour of the system (clean shutdowns).

We now automatically find all binaries to symlink into /usr/bin of containers.

Changes dispatcher back to using a switch statement for the EOS commands
for easier static analysis.

Generating backtrace automatically when ctafrontend dies, collect it for artifacts and display it when the namespace gets deleted so that it appears on the Pipeline.

For the admin functions, it is very clunky to map <cmd,subcmd> pairs to
which function to call using nested switches. Instead we lookup which
function to call in a static const map of <cmd,subcmd> to method function
pointers. Now new commands can be added or old ones removed by editing a
single line in the map definition.

and 1 hour by default.
Previously when cta frontend coredumped, all the files appeared to have
been successfully deleted when it was not the case.
I am now making sure cta client returned with no error to correctly
detect failures.

This will give faster feedback to the operators as they put drives up.
The scheduling can sometimes take a long time and the status update only happened after that.

This is necessary after a system restart if the api server's IP address changed.

sqplus is needed to clean up the database.

preprod workflows

Zero-length metadata now resolves to a valid metadata messages, with
RSP_SUCCESS and no text message.

Increased number of processes watched by a single garbage collector to cover the case for many drive processes per server.

Previously took hostname and port as separate parameters, but they are
provided together in the config file so no point in separating them just
to recombine them.

For cta-taped.conf and cta-frontend.conf use the same parameter
ObjectStore BackendPath .......

If it is a shutdown kill for the cta-taped and there is a tape in the
drive than cleaner should unload&dismount the tape.