CHANGES_NEXT_RELEASE

[cygnus-ngsi, cygnus-common][PosgtgreSQLSink, PostgisSink, MySQLSQLSink] Create upsert transaction (#1806, #1936)
[cygnus-common][NameMappingInterceptor] Catch and log Compile error namemapping (#1924)
[cygnus-ngsi][PosgtgreSQLSink, PostgisSink] Add upsert function. (#1806)
[cygnus-common][SQLBackendImpl] Add configuration option to persist errors in SQL sinks (#1928)
[cygnus-common][SQLBackendImpl] Purge automatically persistence error logs table, keeping latest errors (max_latest_errors setting) (#1929)
[cygnus-ngsi-ld] Creation of the new PostGIS sink for persisting NGSI-LD notifications (#1905)
[cygnus-ngsi][MysqlSink] Quoted Sql field names to avoid naming problems. (#1863)
[cygnus-ngsi][mongoSinkl, sthSink] set the replica set name for the mongodb connection with the environment variable CYGNUS_MONGO_REPLICA_SET