Replace unconventional Optional usages

See gh-44393

Signed-off-by: Johnny Lim <izeye@naver.com>

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java

@@ -20,7 +20,6 @@ import java.time.Duration;
 import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Optional;
 
 import org.springframework.amqp.core.AcknowledgeMode;
 import org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.AddressShuffleMode;
@@ -194,7 +193,7 @@ public class RabbitProperties {
 			if (port != null) {
 				return port;
 			}
-			return (Optional.ofNullable(getSsl().getEnabled()).orElse(false)) ? DEFAULT_PORT_SECURE : DEFAULT_PORT;
+			return Boolean.TRUE.equals(getSsl().getEnabled()) ? DEFAULT_PORT_SECURE : DEFAULT_PORT;
 		}
 		return this.parsedAddresses.get(0).port;
 	}
@@ -235,7 +234,7 @@ public class RabbitProperties {
 	private List<Address> parseAddresses(List<String> addresses) {
 		List<Address> parsedAddresses = new ArrayList<>();
 		for (String address : addresses) {
-			parsedAddresses.add(new Address(address, Optional.ofNullable(getSsl().getEnabled()).orElse(false)));
+			parsedAddresses.add(new Address(address, Boolean.TRUE.equals(getSsl().getEnabled())));
 		}
 		return parsedAddresses;
 	}
@@ -475,7 +474,7 @@ public class RabbitProperties {
 		 * @see #getEnabled() ()
 		 */
 		public boolean determineEnabled() {
-			boolean defaultEnabled = Optional.ofNullable(getEnabled()).orElse(false) || this.bundle != null;
+			boolean defaultEnabled = Boolean.TRUE.equals(getEnabled()) || this.bundle != null;
 			if (CollectionUtils.isEmpty(RabbitProperties.this.parsedAddresses)) {
 				return defaultEnabled;
 			}