small bug fixes

dataproc/src/main/java/ListClusters.java

@@ -31,7 +31,7 @@ public static void listClusters() throws IOException, InterruptedException, Exec
   }
 
   public static void listClusters(String projectId, String region) throws IOException {
-    String myEndpoint = String.format("-dataproc.googleapis.com:443");
+    String myEndpoint = String.format("%s-dataproc.googleapis.com:443", region);
 
     // Configure the settings for the cluster controller client
     ClusterControllerSettings clusterControllerSettings =

dataproc/src/test/java/DeleteClusterTest.java

@@ -39,7 +39,8 @@
 @RunWith(JUnit4.class)
 public class DeleteClusterTest {
 
-  private static final String CLUSTER_NAME = "test-cluster-" + UUID.randomUUID().toString();
+  private static final String CLUSTER_NAME =
+      String.format("test-cluster-%s", UUID.randomUUID().toString());
   private static final String REGION = "us-central1";
   private static final String PROJECT_ID = System.getenv("GOOGLE_CLOUD_PROJECT");
 

dataproc/src/test/java/UpdateClusterTest.java

@@ -43,8 +43,9 @@ public class UpdateClusterTest {
 
   private static final String REGION = "us-central1";
   private static final String PROJECT_ID = System.getenv("GOOGLE_CLOUD_PROJECT");
-  private static final String ENDPOINT = REGION + "-dataproc.googleapis.com:443";
-  private static final String CLUSTER_NAME = "test-cluster-" + UUID.randomUUID().toString();
+  private static final String ENDPOINT = String.format("%s-dataproc.googleapis.com:443", REGION);
+  private static final String CLUSTER_NAME =
+      String.format("test-cluster-%s", UUID.randomUUID().toString());
   private static final int NUM_WORKERS = 2;
   private static final int NEW_WORKERS = NUM_WORKERS * 2;