databases/cego: update 2.32.6 -> 2.32.7

• Fix in CegoFileHandler::releaseFiles. _tabSetId and _isReg vars have to be set to zero/false in any case. Otherwise, it might happen that old entries are still visible and in case of a tableset recreation obsolete file handle information is provided
• Method CegoTransactionManager::hasOpenTransaction added to check for open transaction for a spedific table. This method is called now before a table can be dropped to ensure there are no open transaction for this table.

Submitted by: Bjoern Lemke <lemke@lemke-it.com>