databases/cego: upgrade 2.47.16 -> 2.47.22

- Fix in CegoFunction::clone, also if _exprList is empty, the function
  must treated and cloned completely including table manager reference.
  Otherwise, for user defined function with no arguments which are used
  in views will throw an exception
- Change in CegoJDBCInfo for table list retrievel. This JDBC meta
  information command is not split to tab and vie for dedicated
  retrievel of table and view objects
- More work has been done regarding clean shutdown of the
  database / tableset stop while busy db sessions still exist.
  For this, CegoDistCursr desctructor method has been stabilized,
  so no exception is thrown. Otherwise, double memory freeing of
  cursor resources might occur which results in a crash
- In CegoTableManager::stopTableset, relocated the setTableSetRunState
  method above and added a sleep of DBM_LOCKDELAY. This gives hanging
  db threads a chance, to terminate save
- Changed CegoDatabaseManager::useObject method to take pointer to
  CegoTableManager as an argument instead of threadId. The tablemanager
  is used to support thread termination in case of lock delays
- Fix in CegoTableManager::createBTree to catch exclusicve useObject
  timeout before committing btree. In this case, the already created
  btree object should be deleted. Fix added in CegoClient to active
  abort interrupt also during tuple fetch
- Added function getcount to retrieve current counter value for
  a specific counter
- Fix in CegoLogManager::stopLog, the log handle must NOT be deleted,
  otherwise, a subsequent startLog and logAction method will result
  in a dump. This effect has been observed while importing a single
  table ( via xml import ) which failed, if the table already exists.
  In this case, no checkpoint is written and log handle i no more
  valid. A subsequent modifying db request then results in a core
  dump.

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