GH-42208: [Java] Fix the Test in flight-sql-jdbc-driver Module (#42217)

### Rationale for this change

Adjust assertion message order for JUnit 5 compatibility.

### What changes are included in this PR?

- Reordering the arguments of `assertEquals(expected, actual, message)`

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.

* GitHub Issue: #42208

Authored-by: Hyunseok Seo <hsseo0501@gmail.com>
Signed-off-by: David Li <li.davidm96@gmail.com>

java/flight/flight-sql-jdbc-driver/src/test/java/org/apache/arrow/driver/jdbc/ITDriverJarValidation.java

@@ -70,7 +70,7 @@ private static JarFile getJdbcJarFile() throws IOException {
 
  assertNotNull(driverClassURL, "Driver jar was not detected in the classpath");
  assertEquals(
- "Driver jar was not detected in the classpath", "jar", driverClassURL.getProtocol());
+ "jar", driverClassURL.getProtocol(), "Driver jar was not detected in the classpath");
 
  JarURLConnection connection = (JarURLConnection) driverClassURL.openConnection();
  return connection.getJarFile();