Rename metricName to testName

Signed-off-by: Adrián Moreno <adrian@morenomartinez.com>

README.md

@@ -44,7 +44,7 @@ Then, restart JMeter and the plugin should be loaded.
 
 To make JMeter send test result metrics to Azure Application Insights, in your **Test Pan**, right click on 
 **Thread Group** > Add > Listener > Backend Listener, and choose `io.github.adrianmo.jmeter.backendlistener.azure.AzureBackendClient` as `Backend Listener Implementation`. 
-Then, specify the metric name and the Application Insights instrumentation key as a parameter as shown in image below.
+Then, specify the test name and the Application Insights instrumentation key as a parameter as shown in image below.
 
 ![Screenshot of configuration](docs/configuration.png "Screenshot of JMeter configuration")
 

src/main/java/io/github/adrianmo/jmeter/backendlistener/azure/AzureBackendClient.java

@@ -19,7 +19,7 @@
 public class AzureBackendClient extends AbstractBackendListenerClient {
 
     private TelemetryClient client;
-    private static final String METRIC_NAME = "metricName";
+    private static final String TEST_NAME = "testName";
     private static final String INSTRUMENTATION_KEY = "instrumentationKey";
 
     public AzureBackendClient() {
@@ -29,7 +29,7 @@ public AzureBackendClient() {
     @Override
     public Arguments getDefaultParameters() {
         Arguments arguments = new Arguments();
-        arguments.addArgument(METRIC_NAME, "jmeter");
+        arguments.addArgument(TEST_NAME, "jmeter");
         arguments.addArgument(INSTRUMENTATION_KEY, "");
         return arguments;
     }
@@ -72,7 +72,7 @@ private void trackRequest(String name, SampleResult sr) {
     @Override
     public void handleSampleResults(List<SampleResult> results, BackendListenerContext context) {
         for (SampleResult sr : results) {
-            trackRequest(context.getParameter(METRIC_NAME), sr);
+            trackRequest(context.getParameter(TEST_NAME), sr);
         }
     }
 
@@ -81,5 +81,4 @@ public void teardownTest(BackendListenerContext context) throws Exception {
         client.flush();
         super.teardownTest(context);
     }
-
 }