Fall back to HOSTNAME(1) in stream Java test suite

In case the Java way fails (only on new CI).

Author: acogoluegnes

deps/rabbitmq_stream/test/rabbit_stream_SUITE_data/src/test/java/com/rabbitmq/stream/FailureTest.java

@@ -60,7 +60,6 @@ void tearDown() {
 
   @Test
   void leaderFailureWhenPublisherConnectedToReplica() throws Exception {
-    System.out.println("stream " + stream);
     Set<String> messages = new HashSet<>();
     Client client = cf.get(new Client.ClientParameters().port(TestUtils.streamPortNode1()));
     Map<String, Client.StreamMetadata> metadata = client.metadata(stream);

deps/rabbitmq_stream/test/rabbit_stream_SUITE_data/src/test/java/com/rabbitmq/stream/Host.java

@@ -94,20 +94,23 @@ public static Process rabbitmqctl(String command, String nodename) throws IOExce
   }
 
   public static String node1name() {
-    try {
-      return System.getProperty(
-          "node1.name", "rabbit-1@" + InetAddress.getLocalHost().getHostName());
-    } catch (UnknownHostException e) {
-      throw new RuntimeException(e);
-    }
+    return System.getProperty("node1.name", "rabbit-1@" + hostname());
   }
 
   public static String node2name() {
+    return System.getProperty("node2.name", "rabbit-2@" + hostname());
+  }
+
+  public static String hostname() {
     try {
-      return System.getProperty(
-          "node2.name", "rabbit-2@" + InetAddress.getLocalHost().getHostName());
+      return InetAddress.getLocalHost().getHostName();
     } catch (UnknownHostException e) {
-      throw new RuntimeException(e);
+      try {
+        Process process = executeCommand("hostname");
+        return capture(process.getInputStream()).trim();
+      } catch (Exception ex) {
+        throw new RuntimeException(ex);
+      }
     }
   }