[TEST] Remove global scope mentions

We removed the global cluster with #9781, yet there were still a few mentions of it in comments. Removed them.

src/test/java/org/elasticsearch/test/CurrentTestFailedMarker.java

@@ -26,7 +26,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * A {@link RunListener} that detects  test failures. We need it because we need
- * to reset the global / suite level cluster if a test fails but don't wanna reset it
+ * to reset the suite level cluster if a test fails but don't wanna reset it
  * for every subsequent test.
  */
 public class CurrentTestFailedMarker extends RunListener {

src/test/java/org/elasticsearch/test/ElasticsearchIntegrationTest.java

@@ -244,8 +244,7 @@ public abstract class ElasticsearchIntegrationTest extends ElasticsearchTestCase
 
     /**
      * The current cluster depending on the configured {@link Scope}.
-     * By default if no {@link ClusterScope} is configured this will hold a reference to the global cluster carried
-     * on across test suites.
+     * By default if no {@link ClusterScope} is configured this will hold a reference to the suite cluster.
      */
     private static TestCluster currentCluster;
 
@@ -603,10 +602,8 @@ public abstract class ElasticsearchIntegrationTest extends ElasticsearchTestCase
             // TODO: it looks like CurrentTestFailedMarker is never set at this point, so testFailed() will always be false?
             if (!success || CurrentTestFailedMarker.testFailed()) {
                 // if we failed that means that something broke horribly so we should
-                // clear all clusters and if the current cluster is the global we shut that one
-                // down as well to prevent subsequent tests from failing due to the same problem.
-                // we also reset everything in the case we had a failure in the suite to make sure subsequent
-                // tests get a new / clean cluster
+                // clear all clusters. we also reset everything in the case we had a failure
+                // in the suite to make sure subsequent tests get a new / clean cluster
                 clearClusters();
                 currentCluster = null;
             }

src/test/java/org/elasticsearch/test/ElasticsearchThreadFilter.java

@@ -27,8 +27,7 @@ import java.util.regex.Pattern;
 
 /**
  * Simple thread filter for randomized runner
- * This filter rejectes all threads that are known to leak across
- * tests / suites ie. the global test cluster threads etc.
+ * This filter rejectes all threads that are known to leak across tests / suites
  * It will cause threads leaking from threadpools / executors in unittests
  * to fail the test.
  */

src/test/java/org/elasticsearch/test/rest/RestTestExecutionContext.java

@@ -125,7 +125,7 @@ public class RestTestExecutionContext implements Closeable {
             restClient = new RestClient(restSpec, settings, addresses);
         } else {
             //re-initialize the REST client if the addresses have changed
-            //happens if there's a failure since we restart the global cluster due to that
+            //happens if there's a failure since we restart the suite cluster due to that
             Set<InetSocketAddress> newAddresses = Sets.newHashSet(addresses);
             Set<InetSocketAddress> previousAddresses = Sets.newHashSet(restClient.httpAddresses());
             if (!newAddresses.equals(previousAddresses)) {