Using trace for some verbose sink logging

"debug" is helpful on the source side for seeing some info on each poll call. But the "Processing record" message in the sink connector shows up for every single sink record; that can quickly become overwhelming. So shifted that to "trace".

Author: rjrudin

src/main/java/com/marklogic/kafka/connect/sink/AbstractSinkTask.java

@@ -107,8 +107,8 @@ private void logRecordBeforeWriting(SinkRecord sinkRecord) {
             sinkRecord.headers().forEach(header -> headers.add(String.format("%s:%s", header.key(), header.value().toString())));
             logger.info("Record headers: {}", headers);
         }
-        if (logger.isDebugEnabled()) {
-            logger.debug("Processing record value {} in topic {}", sinkRecord.value(), sinkRecord.topic());
+        if (logger.isTraceEnabled()) {
+            logger.trace("Processing record value {} in topic {}", sinkRecord.value(), sinkRecord.topic());
         }
     }