Implement methods to modify values for FILE_REGEXP, FREE_SPACE_QUERY_URL, REFRESH_INTERVAL, TARGETED_FREE_SPACE, USER_COMMENT

Implement catalogue createDiskSystem,
getAllDiskSystems, deleteDiskSystem methods.

The implemantation currently returns an empty disk system.

Deleted the checking of the presence of non superseded files during an Archive Mount.

Added a check while mounting a tape for writing : if some tape files located in the writing tape are not superseded by others,
the write session will fail.

Note: The test CatalogueTest.exist_non_superseded_files_after_fseq is supposed to fail.

Harmonized the copyNb type to uint32_t
Corrected a bug in RetrieveQueue::getContainerSummary() --> After insertion in the queue, the number of files and bytes added were equal to 0.

Added the first version of the specification of the Catalogue::getTapeFilesForRepack() method - there's no implementation yet

Added MEDIA_TYPE and VENDOR columns to TAPE table and upgraded xrootd-ssi-protobuf-interface to v0.29

The catalogue can receive polymorphic items as input for recording.
The strict sequencing of fSeqs is still enforced.
Currently, 2 items types are recorded: files and placehoders.
Files are recorded to the tape catalogue, while place holders are not,
but they are used to enforce the fSeq sequencing.

Done

Added CatalogueRetryWrapper.hpp