HttpTestCase#fsck: Open TestRepository in try-with-resource

Change-Id: Ibda8c9970322871abf0fcf1244977bed04eaedd2
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.junit.http/src/org/eclipse/jgit/junit/http/HttpTestCase.java

@@ -186,9 +186,10 @@ public abstract class HttpTestCase extends LocalDiskRepositoryTestCase {
 	 */
 	protected static void fsck(Repository db, RevObject... tips)
 			throws Exception {
-		TestRepository<? extends Repository> tr =
-				new TestRepository<>(db);
-		tr.fsck(tips);
+		try (TestRepository<? extends Repository> tr =
+				new TestRepository<>(db)) {
+			tr.fsck(tips);
+		}
 	}
 
 	/**