Deprecate ClientLogger.

Original Pull Request #2354
Closes #2353

Author: sothawo

src/main/asciidoc/reference/elasticsearch-migration-guide-4.4-5.0.adoc

@@ -6,6 +6,12 @@ This section describes breaking changes from version 4.4.x to 5.0.x and how remo
 [[elasticsearch-migration-guide-4.4-4.5.deprecations]]
 == Deprecations
 
+=== Custom trace level logging
+
+Logging by setting the property `logging.level.org.springframework.data.elasticsearch.client.WIRE=trace` is 
+deprecated now, the Elasticsearch `RestClient` provides a better solution that can be activated by setting the 
+logging level of the `tracer` package to "trace".
+
 [[elasticsearch-migration-guide-4.4-4.5.deprecations.package]]
 === `org.springframework.data.elasticsearch.client.erhlc` package
 

src/main/java/org/springframework/data/elasticsearch/client/ClientLogger.java

@@ -31,7 +31,9 @@
  * @author Peter-Josef Meisch
  * @author Oliver Drotbohm
  * @since 3.2
+ * @deprecated since 5.0, Elasticsearch's RestClient has a trace level logging available.
  */
+@Deprecated
 public abstract class ClientLogger {
 
 	private static final Log WIRE_LOGGER = LogFactory.getLog("org.springframework.data.elasticsearch.client.WIRE");

src/main/java/org/springframework/data/elasticsearch/client/elc/ElasticsearchClients.java

@@ -290,7 +290,9 @@ private static org.apache.http.Header[] toHeaderArray(HttpHeaders headers) {
 	 *
 	 * @see ClientLogger
 	 * @since 4.4
+	 * @deprecated since 5.0
 	 */
+	@Deprecated
 	private static class HttpLoggingInterceptor implements HttpResponseInterceptor, HttpRequestInterceptor {
 
 		@Override

src/main/java/org/springframework/data/elasticsearch/client/erhlc/RestClients.java

@@ -184,7 +184,9 @@ default void close() throws IOException {
 	 *
 	 * @see ClientLogger
 	 * @since 3.2
+	 * @deprecated since 5.0
 	 */
+	@Deprecated
 	private static class HttpLoggingInterceptor implements HttpResponseInterceptor, HttpRequestInterceptor {
 
 		@Override