databases/cego: update 2.48.45 -> 2.48.48

• Fix in CegoAdmScreen::TableSet::TableSet constructor, SysUsage field added to indicate correct usage for system, temp and app files
• Patch added for transaction handling in CegoTransactionManager::doCommit and CegoTableManager::deleteDataTableEntry. Just for tuple state COMMITTED, a rollback entry must be created, otherwise double tuple delete may occur. For tuple state INSERTED, tuple state is just set to OBSOLETE, for tuple state OBSOLETE and DELETED, nothing has to be done. In CegoTableManager::doCommit, tuple state just has to be set to COMMITTED in case of INSERTED tuples
• Elimination of a cout in CegoQueryCache::QueryCacheEntry::cleanCache