databases/cego: update 2.47.3 -> 2.47.6 and devel/lfcbase: 1.16.1 -> 1.16.2

lfcbase:

• Added HashT::getRangePos and HashT::RemovePos for more efficient hash array manipulation

cego:

• Fix in CegoQueryCacheEntry::cleanCache, reset of all relevant variables. Furthermore, in CegoQueryCache methods, remove from hasharray is checked for return code true
• Usage of new HashT methods ( getRangePos and RemovePos ) for CegoQueryCache to remove entries from query cache array more efficient
• Fix in CegoFactor::evalFieldValue(), for case CegoFactor::QUERY, the fetched value must be saved to a local copy, otherwise the buffer could be overwritten by the subsequent nextTuple method call to complete the query for query cache. As a result, wrong values are returned in case of heavy buffer cache relocation.