Generated the json files of non repacked files, self repacked files and repacked files for further jq querying
Added a script repack_generate_report.sh that will be executed at the end of each repack_systemtest

Added unit test to test it
Added a Repack Request expansion time limit (if the expansion last more than this time limit, it will be requeued)
Added jq to the buildtree

Added a deadline for hearbeat update (60s and 30s respectively) and bumped up garbage collection deadline to 90s.

This bug was introduced earlier this year. It led to spurious garbage collections in stress tests.

Changed the exception thrown by rootEntry.getRepackIndexAddress() from cta::RootEntry::NotAllocated to cta::exception::Exception to
spot if the backtrace comes from the macro generating the exceptions

This will prevent the process surviving during signal propagation time.

This will allow diagnosing slow-downs.

The garbage collector now sets a flag on the agent object indicating garbage collection.
The process will immediately exit when detecting garbage collection.

The status of the repack request is updated throughout all its lifecycle (Pending, ToExpand, Starting, Running, Complete or failed)

Replaced the map of tape files with a list as the assumption that we have one copy per copyNb is no more valid with repack.

This included extracting missing data while popping elements from archive queue.

- Queueing into the RetrieveQueueToReportToRepackForFailure
- Reporting of the failed RetrieveJobs (add statistics + deletion of the failed sub requests)
Unit test associated : expandRepackRequestFailedRetrieve

These requests are queued in the RetrieveQueueToReportToRepackForFailure
Adapted the Sorter to be able to queue a RetrieveRequest from Repack into a queue identified by the RepackRequest's address

Updated the unit tests to validate the queues and requests are as expected.

Changed the reporting structures in the repack request to better handle repoting
(we will report one archive job per rearchived copy number, which is potentially
several per fSeq.

Created the getNextBatch() function for retrieve successes and partially implemented
the report function.

The retrieve requests now carry all the information necessary to create the archive jobs.
Retrive requests carry an isRepack boolean. The distinction between repack and non-repack behaviour
is pushed as low as possible in the api (in the object store) so that client code can be more
generic. For the same reason, the
The expand repack mode (re-creation of missing tape files) is not supported yet.
Changed the represenation of copy numbers to uint32 (as this is the smalled number supported but protocol buffers).
Added ArchiveRoute::StorageClassMap and ArchiveRoute::FullMap to store archive routing in memory.
Added repack buffer base URL support, and mechanism to compute temporary copy location in disk cache.
Fixed bug in ObjectOps<>::asyncInsert();
Inplemented the path generation for repack disk storage (<BaseURL>/<VID>/<FSeq (09%d)>).

Renamed some status (#447 issue)
Harmonized the name of the Archive and Retrieve queues in the cta.proto file and made the changes in the C++ code

Documentation of the public methods of the sorter