This is for client-side processing of incoming records on the stream

It helps to remember to add the new file before committing

We now assume that Finished() will always be called, so explicit timeout
handling in RequestProc is redundant.

In case of successful Request processing, the XRootD framework will call
Finished(cancel=false). In the case of a failure or timeout, the framework
will call Finished(cancel=true).

Fixed errors generated by Scheduler code passing getMessage() instead of getMessage().str() to ScopedParamContainer.add()

mediachanger code.

Example error:

/home/smurray/CTA/mediachanger/io.hpp:353:3: error: dynamic exception
specifications are deprecated in C++11 [-Werror=deprecated]
   throw(cta::exception::TimeOut, cta::exception::Exception);
   ^~~~~

This ensures the uniqueness of the agent name even if a process creates an agent several times in the same second.

Forwarding -b and -B options to `create_instance.sh` so that we can run the buildtree test directly like this:
```
./run_systemtest.sh  -n toto -s tests/archive_retrieve.sh -O -D -k -b /buildtree -B CTA-build
```
This will be very helpful to test buildtree in CI automatically.

They prevented propoer statistics update.

As systemd is mounting tmpfs in /tmp, I had to move the artifacts
repository to /opt/repo (which is anyway better).
Default entry point in the container is systemd and I added /etc/rc.local entry point for systemd containers.
Initially it is pulled from a shared mount on the kubelet running the
pod.
This commit is compatible with the standard way of running CI jobs,
following sytemd commits may break retrocompatibility.

This allowed the archive requeuest to be removed from ownership bulk.
Also adapted unit tests and related Mocks (mainly MockArchiveMount).
Removed unused functions from job level updating.

This will enable better integration and bulk archive jobs ownership removal from agent.

Default ctafrontend rpm xrootd configuration file is CI ready. No more duplicate in the continuousintegration tree.

Changing /etc/ctafrontend_SSS_c.keytab and /etc/ctafrontend_SSS_s.keytab to /etc/cta/cta-cli.sss.keytab so that CI and preprod have now the same configuration files.

Keep in mind thatL
The user in the ctafrontend SSS key is the EOS instance name, the rest is BS. I tried to make it clear in the configuration files and names when a field is useless.
WFE scripts are now the same between preprod and CI and the ctafrontend
configuration file can move in the rpm.