Don't validate internal database.history.connector.* config parameters

Request: PUT /connector-plugins/io.debezium.connector.mysql.MySqlConnector/config/validate HTTP/1.1 Host: localhost:18083 User-Agent: Go-http-client/1.1 Content-Length: 936 Content-Type: application/json Accept-Encoding: gzip { "column.propagate.source.type" : ".*" , "connector.class" : "io.debezium.connector.mysql.MySqlConnector" , "database.history.kafka.bootstrap.servers" : "kafka:19092" , "database.history.kafka.topic" : "schema-changes.inventory" , "database.history.store.only.monitored.tables.ddl" : " true " , "database.hostname" : "mysql" , "database.password" : "123456" , "database.port" : "3306" , "database.server.name" : "inventory" , "database.user" : "binlog" , "database.whitelist" : "inventory" , "decimal.handling.mode" : "string" , "include.query" : " true " , "include.schema.changes" : " true " , "key.converter" : "io.confluent.connect.avro.AvroConverter" , "key.converter.schema.registry.url" : "http: //schema-registry:8081" , "max.batch.size" : "81920" , "max.queue.size" : "327680" , "name" : "inventory_debezium" , "snapshot.mode" : "schema_only" , "table.whitelist" : "inventory.customers" , "value.converter" : "io.confluent.connect.avro.AvroConverter" , "value.converter.schema.registry.url" : "http: //schema-registry:8081" } Response: Since Kafka Connect returns all config parameters for validation enpoint, I've only added the ones with error. { "definition" : null , "value" : { "name" : "database.history.connector.id" , "value" : null , "recommended_values" : [], "errors" : [ "Configuration is not defined: database.history.connector.id" ], "visible" : true } }, { "definition" : null , "value" : { "name" : "database.history.connector.class" , "value" : null , "recommended_values" : [], "errors" : [ "Configuration is not defined: database.history.connector.class" ], "visible" : true } }