URIishTest: Use @Test annotation's `expected` argument

Specify the expected exception in the annotation, instead of
catching it and calling `fail()` when it wasn't raised.

Change-Id: I8a640c0e42353533e4e73b85b50c224dc060f2d7
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/URIishTest.java

 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import java.io.File;
 import java.io.IOException;
 	private static final String GIT_SCHEME = "git://";
 
 	@SuppressWarnings("unused")
-	@Test
+	@Test(expected = URISyntaxException.class)
 	public void shouldRaiseErrorOnEmptyURI() throws Exception {
-		try {
-			new URIish("");
-			fail("expecting an exception");
-		} catch (URISyntaxException e) {
-			// expected
-		}
+		new URIish("");
 	}
 
 	@SuppressWarnings("unused")
-	@Test
+	@Test(expected = URISyntaxException.class)
 	public void shouldRaiseErrorOnNullURI() throws Exception {
-		try {
-			new URIish((String) null);
-			fail("expecting an exception");
-		} catch (URISyntaxException e) {
-			// expected
-		}
+		new URIish((String) null);
 	}
 
 	@Test
 		assertEquals(u, new URIish(str));
 	}
 
-	@Test
+	@Test(expected = IllegalArgumentException.class)
 	public void testGetNullHumanishName() {
-		try {
-			new URIish().getHumanishName();
-			fail("path must be not null");
-		} catch (IllegalArgumentException e) {
-			// expected
-		}
+		new URIish().getHumanishName();
 	}
 
-	@Test
+	@Test(expected = IllegalArgumentException.class)
 	public void testGetEmptyHumanishName() throws URISyntaxException {
-		try {
-			new URIish(GIT_SCHEME).getHumanishName();
-			fail("empty path is useless");
-		} catch (IllegalArgumentException e) {
-			// expected
-		}
+		new URIish(GIT_SCHEME).getHumanishName();
 	}
 
-	@Test
+	@Test(expected = IllegalArgumentException.class)
 	public void testGetAbsEmptyHumanishName() {
-		try {
-			new URIish().getHumanishName();
-			fail("empty path is useless");
-		} catch (IllegalArgumentException e) {
-			// expected
-		}
+		new URIish().getHumanishName();
 	}
 
 	@Test