MAINT: set default log level for GRPC Response log

conf/core/log4j2-default.properties

@@ -8,6 +8,10 @@ verbose = true
 property.LOG_DIR = log
 property.REQUEST_TIME_LOGGER_LEVEL = OFF
 
+# the root logger has level "WARN" but we want to log the GRPC traffic in INFO level:
+logger.grpc_response_log.name = org.caosdb.server.grpc.LoggingInterceptor
+logger.grpc_response_log.level = INFO
+
 ## appenders
 # stderr
 appender.stderr.type = Console