narrow down UIServer.stop() to declare throwing InterruptedException; fix typo in test

Signed-off-by: Tamás Fenyvesi <tamas.fenyvesi@doknet.hu>

deeplearning4j/deeplearning4j-ui-parent/deeplearning4j-vertx/src/main/java/org/deeplearning4j/ui/api/UIServer.java

@@ -157,8 +157,9 @@ public interface UIServer {
 
     /**
      * Stop/shut down the UI server. This synchronous function should wait until the server is stopped.
+     * @throws InterruptedException if the current thread is interrupted while waiting
      */
-    void stop() throws Exception;
+    void stop() throws InterruptedException;
 
     /**
      * Stop/shut down the UI server.

deeplearning4j/deeplearning4j-ui-parent/deeplearning4j-vertx/src/test/java/org/deeplearning4j/ui/TestVertxUIManual.java

@@ -259,7 +259,7 @@ public class TestVertxUIManual extends BaseDL4JTest {
                         log.info("Auto-detaching StatsStorage (session ID: {}) after {} ms.",
                                 sessionId, autoDetachTimeoutMillis);
                         uIServer.detach(statsStorage);
-                        log.info(" To re-attach StatsStorage of training session, visit {}}/train/{}",
+                        log.info(" To re-attach StatsStorage of training session, visit {}/train/{}",
                                 uIServer.getAddress(), sessionId);
                     }
                 }).start();