Make NarayanaRecoveryManagerBean conditional on missing bean

See gh-9724

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/transaction/jta/NarayanaJtaConfiguration.java

@@ -119,6 +119,7 @@ public class NarayanaJtaConfiguration {
 	}
 
 	@Bean
+	@ConditionalOnMissingBean
 	public NarayanaRecoveryManagerBean narayanaRecoveryManager(
 			RecoveryManagerService recoveryManagerService) {
 		return new NarayanaRecoveryManagerBean(recoveryManagerService);