try suppress deprecated warning on class level

Author: Vladimir Kotal

suggester/src/test/java/org/opengrok/suggest/SuggesterSearcherTest.java

@@ -52,14 +52,14 @@
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.contains;
 
+@SuppressWarnings("deprecation") // for RAMDirectory
 public class SuggesterSearcherTest {
 
     private static Directory dir;
 
     private static SuggesterSearcher searcher;
 
     @BeforeClass
-    @SuppressWarnings("deprecation") // for RAMDirectory
     public static void setUpClass() throws IOException {
         dir = new RAMDirectory();