Fix GitConstructionTest teardown

The teardown faile on Windows because the repos were not closed.

Change-Id: I16cf5645558680029682f898386b061796948237
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GitConstructionTest.java

@@ -51,6 +51,7 @@ import org.eclipse.jgit.api.ListBranchCommand.ListMode;
 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.lib.RepositoryTestCase;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -73,6 +74,14 @@ public class GitConstructionTest extends RepositoryTestCase {
 				.getRepository();
 	}
 
+	@Override
+	@After
+	public void tearDown() throws Exception {
+		db.close();
+		bareRepo.close();
+		super.tearDown();
+	}
+
 	@Test
 	public void testWrap() {
 		Git git = Git.wrap(db);