ViewFilterTest: Add missing @Test annotation found by error-prone

Change-Id: I65efdc365dd5a7cbe8775fb6e402fe040bb2d275

gitiles-servlet/src/test/java/com/google/gitiles/ViewFilterTest.java

diff --git a/gitiles-servlet/src/test/java/com/google/gitiles/ViewFilterTest.java b/gitiles-servlet/src/test/java/com/google/gitiles/ViewFilterTest.java
index e6be334..eff0e59 100644
--- a/gitiles-servlet/src/test/java/com/google/gitiles/ViewFilterTest.java
+++ b/gitiles-servlet/src/test/java/com/google/gitiles/ViewFilterTest.java
@@ -449,6 +449,7 @@
     assertEquals("foo/bar", view.getPathPart());
   }
 
+  @Test
   public void testNormalizeParents() throws Exception {
     RevCommit parent = repo.commit().create();
     RevCommit master = repo.branch("refs/heads/master").commit().parent(parent).create();