Polish "Use 'unknown' when RabbitMQ version is missing"

See gh-48484

Author: snicoll

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/amqp/RabbitHealthIndicatorTests.java

@@ -67,14 +67,6 @@ void healthWhenConnectionSucceedsShouldReturnUpWithVersion() {
 		assertThat(health.getDetails()).containsEntry("version", "123");
 	}
 
-	@Test
-	void healthWhenConnectionFailsShouldReturnDown() {
-		givenTemplateExecutionWillInvokeCallback();
-		given(this.channel.getConnection()).willThrow(new RuntimeException());
-		Health health = new RabbitHealthIndicator(this.rabbitTemplate).health();
-		assertThat(health.getStatus()).isEqualTo(Status.DOWN);
-	}
-
 	@Test
 	void healthWhenVersionIsMissingShouldReturnUpWithUnknownVersion() {
 		givenTemplateExecutionWillInvokeCallback();
@@ -86,6 +78,14 @@ void healthWhenVersionIsMissingShouldReturnUpWithUnknownVersion() {
 		assertThat(health.getDetails()).containsEntry("version", "unknown");
 	}
 
+	@Test
+	void healthWhenConnectionFailsShouldReturnDown() {
+		givenTemplateExecutionWillInvokeCallback();
+		given(this.channel.getConnection()).willThrow(new RuntimeException());
+		Health health = new RabbitHealthIndicator(this.rabbitTemplate).health();
+		assertThat(health.getStatus()).isEqualTo(Status.DOWN);
+	}
+
 	private void givenTemplateExecutionWillInvokeCallback() {
 		given(this.rabbitTemplate.execute(any())).willAnswer((invocation) -> {
 			ChannelCallback<?> callback = invocation.getArgument(0);