ReflogTest: Open Git instances in try-with-resource

Change-Id: I950b6f16148cfe11de729b04904f88d6e4c28b9a
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/ReflogTest.java

@@ -57,24 +57,27 @@ public class ReflogTest extends CLIRepositoryTestCase {
 
 	@Test
 	public void testSingleCommit() throws Exception {
-		new Git(db).commit().setMessage("initial commit").call();
+		try (Git git = new Git(db)) {
+			git.commit().setMessage("initial commit").call();
 
-		assertEquals("6fd41be HEAD@{0}: commit (initial): initial commit",
-				execute("git reflog")[0]);
+			assertEquals("6fd41be HEAD@{0}: commit (initial): initial commit",
+					execute("git reflog")[0]);
+		}
 	}
 
 	@Test
 	public void testBranch() throws Exception {
-		Git git = new Git(db);
-		git.commit().setMessage("first commit").call();
-		git.checkout().setCreateBranch(true).setName("side").call();
-		writeTrashFile("file", "side content");
-		git.add().addFilepattern("file").call();
-		git.commit().setMessage("side commit").call();
+		try (Git git = new Git(db)) {
+			git.commit().setMessage("first commit").call();
+			git.checkout().setCreateBranch(true).setName("side").call();
+			writeTrashFile("file", "side content");
+			git.add().addFilepattern("file").call();
+			git.commit().setMessage("side commit").call();
 
-		assertArrayEquals(new String[] {
-				"38890c7 side@{0}: commit: side commit",
-				"d216986 side@{1}: branch: Created from commit first commit",
-				"" }, execute("git reflog refs/heads/side"));
+			assertArrayEquals(new String[] {
+					"38890c7 side@{0}: commit: side commit",
+					"d216986 side@{1}: branch: Created from commit first commit",
+					"" }, execute("git reflog refs/heads/side"));
+		}
 	}
 }