RepoCommandTest: Open Git instances in try-with-resource

Change-Id: I171e84eeb7862e74761ba6c961f14c86beaba9e7
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/gitrepo/RepoCommandTest.java

@@ -82,7 +82,7 @@ public class RepoCommandTest extends RepositoryTestCase {
 		super.setUp();
 
 		defaultDb = createWorkRepository();
-		Git git = new Git(defaultDb);
+		try (Git git = new Git(defaultDb)) {
 			JGitTestUtil.writeTrashFile(defaultDb, "hello.txt", "branch world");
 			git.add().addFilepattern("hello.txt").call();
 			oldCommitId = git.commit().setMessage("Initial commit").call().getId();
@@ -93,27 +93,31 @@ public class RepoCommandTest extends RepositoryTestCase {
 			git.add().addFilepattern("hello.txt").call();
 			git.commit().setMessage("Second commit").call();
 			addRepoToClose(defaultDb);
+		}
 
 		notDefaultDb = createWorkRepository();
-		git = new Git(notDefaultDb);
+		try (Git git = new Git(notDefaultDb)) {
 			JGitTestUtil.writeTrashFile(notDefaultDb, "world.txt", "hello");
 			git.add().addFilepattern("world.txt").call();
 			git.commit().setMessage("Initial commit").call();
 			addRepoToClose(notDefaultDb);
+		}
 
 		groupADb = createWorkRepository();
-		git = new Git(groupADb);
+		try (Git git = new Git(groupADb)) {
 			JGitTestUtil.writeTrashFile(groupADb, "a.txt", "world");
 			git.add().addFilepattern("a.txt").call();
 			git.commit().setMessage("Initial commit").call();
 			addRepoToClose(groupADb);
+		}
 
 		groupBDb = createWorkRepository();
-		git = new Git(groupBDb);
+		try (Git git = new Git(groupBDb)) {
 			JGitTestUtil.writeTrashFile(groupBDb, "b.txt", "world");
 			git.add().addFilepattern("b.txt").call();
 			git.commit().setMessage("Initial commit").call();
 			addRepoToClose(groupBDb);
+		}
 
 		resolveRelativeUris();
 	}