Simplify variable name from configuration to config

ecosystem/tracing/api/src/test/java/org/apache/shardingsphere/elasticjob/tracing/yaml/YamlTracingConfigurationConverterTest.java

@@ -30,7 +30,8 @@ class YamlTracingConfigurationConverterTest {
 
     @Test
     void assertConvertTracingConfiguration() {
-        JobEventCaller expectedStorage = () -> { };
+        JobEventCaller expectedStorage = () -> {
+        };
         TracingConfiguration<JobEventCaller> tracingConfig = new TracingConfiguration<>("TEST", expectedStorage);
         YamlTracingConfigurationConverter<JobEventCaller> converter = new YamlTracingConfigurationConverter<>();
         YamlTracingConfiguration<JobEventCaller> actual = converter.convertToYamlConfiguration(tracingConfig);