CatalogueTest now asserts new archive file identifiers are unique as opposed to strictly incrementing sequentially by 1

Woah!  Got carried away with const.  This commit Removes the const
qualifier from the ArchiveFileItor::next() method because next()
modifies the iterator.

To loop through an ArchiveFileItor:

  auto itor = catalogue.getArchiveFilesForRepackItor(vid, startFSeq);
  while(itor.hasMore()) {
    const auto archiveFile = itor.next();
    // Do something with archiveFile
  }

Modified MysqlCatalogue.cpp to use autocommitMode default of Stmt::executeQuery() and Stmt::executeNonQuery()

Modified RdbmsArchiveFileItorImpl.cpp to use autocommitMode default of Stmt::executeQuery() and Stmt::executeNonQuery()

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

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

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.

implementation of "cta-admin archivefile ls -all".  A
missing order by clause meant that non deterministic
listings were given.

This commit adds the missing "order by" clause.

Following on from GitLab issue cta/CTA#371, replaced INTEGER with NUMERIC(20, 0) within oracle_catalogue_schema_header.sql

Following on from GitLab issue cta/CTA#371, replaced INTEGER with NUMERIC(20, 0) within mysql_catalogue_schema_header.sql

Changed common_catalogue_schema.sql for cta/CTA#371 'Change INTEGER columns of CTA catalogue schema to NUMERIC(20,0)'

Fixed cta/CTA#364 RdbmsArchiveFileItorImpl constructor should NOT return database connection to pool

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

Revert "Revert "Removed the need for a deferred transaction from SQLiteCatalogue::getNextArchiveFileId() and getNextStorageClassId()""

This reverts commit 613808d9.

Revert "Removed the need for a deferred transaction from SQLiteCatalogue::getNextArchiveFileId() and getNextStorageClassId()"

This reverts commit 8f7bd42f.

Removed the need for a deferred transaction from SQLiteCatalogue::getNextArchiveFileId() and getNextStorageClassId()