RefUpdateTest: Don't call createBareRepository in try-with-resource

createBareRepository adds the created repo to the list of repos to be
closed in the superclass's teardown. Wrapping it in try-with-resource
causes it to be closed too many times, resulting in a corrupt use
count.

Change-Id: I4c70630bf6008544324dda453deb141f4f89472c
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/RefUpdateTest.java

@@ -239,14 +239,14 @@ public class RefUpdateTest extends SampleDataRepositoryTestCase {
 
 	@Test
 	public void testDeleteHeadInBareRepo() throws IOException {
-		try (Repository bareRepo = createBareRepository()) {
-			RefUpdate ref = bareRepo.updateRef(Constants.HEAD);
-			ref.setNewObjectId(ObjectId.fromString("0123456789012345678901234567890123456789"));
-			// Create the HEAD ref so we can delete it.
-			assertEquals(Result.NEW, ref.update());
-			ref = bareRepo.updateRef(Constants.HEAD);
-			delete(bareRepo, ref, Result.NO_CHANGE, true, true);
-		}
+		Repository bareRepo = createBareRepository();
+		RefUpdate ref = bareRepo.updateRef(Constants.HEAD);
+		ref.setNewObjectId(ObjectId
+				.fromString("0123456789012345678901234567890123456789"));
+		// Create the HEAD ref so we can delete it.
+		assertEquals(Result.NEW, ref.update());
+		ref = bareRepo.updateRef(Constants.HEAD);
+		delete(bareRepo, ref, Result.NO_CHANGE, true, true);
 	}
 	/**
 	 * Delete a loose ref and make sure the directory in refs is deleted too,