[bs-127] Add DataSourceTransactionManager if no others are in use

* If the auto config class has a high Order it can check for
an existing transaction manager
* Unit tests added, and checked also witrh petclinic

[Fixes #50064347]

spring-bootstrap-samples/spring-bootstrap-actuator-sample/src/main/java/org/springframework/bootstrap/sample/service/ProductionDatabase.java

@@ -1,55 +0,0 @@
-/*
- * Copyright 2012-2013 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.bootstrap.sample.service;
-
-import javax.sql.DataSource;
-
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Profile;
-
-/**
- * @author Dave Syer
- * 
- */
-@Configuration
-@Profile("prod")
-public class ProductionDatabase {
-
-	@Value("${spring.database.driverClassName:com.mysql.jdbc.Driver}")
-	private String driverClassName;
-
-	@Value("${spring.database.url:jdbc:mysql://localhost:3306/test}")
-	private String url;
-
-	@Value("${spring.database.username:root}")
-	private String username;
-
-	@Value("${spring.database.password:}")
-	private String password;
-
-	@Bean
-	public DataSource dataSource() {
-		org.apache.tomcat.jdbc.pool.DataSource pool = new org.apache.tomcat.jdbc.pool.DataSource();
-		pool.setDriverClassName(this.driverClassName);
-		pool.setUrl(this.url);
-		pool.setUsername(this.username);
-		pool.setPassword(this.password);
-		return pool;
-	}
-
-}