Deleted the checking of the presence of non superseded files during an Archive Mount.

Fixed.

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.

Added a check while mounting a tape for writing : if some tape files located in the writing tape are not superseded by others,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

This commit works towards issue cta/CTA#436.

Modified RdbmsCatalogue to use autocommitMode default of Stmt::executeQuery() and Stmt::executeNonQuery()

Please note that OracleCatalogue::filesWrittenToTape() now updates the TAPE
table row with AUTOCOMMIT_ON before going on to handle the individual file
entries.  This can be improved when Conn:setAutocommit() becomes available.

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

Moved autocommitMode parameter from Stmt constructor to Stmt::executeQuery() and Stmt::executeNonQuery()

Renamed rdbms::AutocommitMode::ON and rdbms::AutocommitMode::OFF to rdbms::AutocommitMode::AUTOCOMMIT_ON and rdbms::AutocommitMode::OFF respectively

Moved OracleCatalogue::deleteArchiveFile to RdbmsCatalogue because Oracle, MySQL and PostgreSQL support 'SELECT FOR UPDATE'.  SQLite is the odd one out in that it does not provide support.

Catalogue::PrepareToRetrieveXXXX() methods now throw UserError exceptions if the tapes involved are disabled.  The error message is now clearer: 'No tape files available for archive file with ...

RdbmsCatalogue::getArchiveFileXXXX() methods now retrieve the latest version of a tape copy accurate to the nearest second