Use errorLogger name for error logger endpoint

The long `IntegrationContextUtils.ERROR_LOGGER_BEAN_NAME` name
is used for `errorChannel` `LoggingHandler`'s endpoint.
It is too long for endpoint node in the graph meanwhile the
`errorChannel` is good everywhere

* Change a `LoggingHandler`'s endpoint for `errorChannel`
bean name to the `errorLogger`, leaving exiting
`IntegrationContextUtils.ERROR_LOGGER_BEAN_NAME` as an alias
This way a `componentName` for the `LoggingHandler` is going
to be as `errorLogger` and will draw a node in UI nicely

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/config/DefaultConfiguringBeanFactoryPostProcessor.java

@@ -233,7 +233,7 @@ private void registerErrorChannel() {
 
 			BeanComponentDefinition componentDefinition =
 					new BeanComponentDefinition(loggingEndpointBuilder.getBeanDefinition(),
-							IntegrationContextUtils.ERROR_LOGGER_BEAN_NAME);
+							"errorLogger", new String[] { IntegrationContextUtils.ERROR_LOGGER_BEAN_NAME });
 			BeanDefinitionReaderUtils.registerBeanDefinition(componentDefinition, this.registry);
 		}
 	}