Changes (since 2.5.0):
- [cygnus-ngsi][SQLSinks] Fix batch Upsert to build one query for each one of the different unique key values.
- [cygnus-ngsi][NGSISink] Fix batch managing to fix data losing when an event of the batch fails (#1967)
- [cygnus-common][SQLBackendImpl] Avoid use word
purge
as tmp when purge mysql error table due is a reserved word in mysql