Fix #860 (external database performance) by using connection pooling … (#864)

* Fix #860 (external database performance) by using connection pooling (using commons-dbcp2)

airsonic-main/src/main/resources/applicationContext-db-embed.xml

@@ -4,11 +4,11 @@
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"
        profile="embed">
     <bean id="dataSource"
-          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
+          class="org.apache.commons.dbcp2.BasicDataSource">
 
         <property name="driverClassName" value="${DatabaseConfigEmbedDriver}" />
         <property name="url" value="${DatabaseConfigEmbedUrl}" />
         <property name="username" value="${DatabaseConfigEmbedUsername}" />
         <property name="password" value="${DatabaseConfigEmbedPassword}" />
     </bean>
-</beans>
+</beans>

airsonic-main/src/test/resources/application.properties

@@ -6,8 +6,8 @@ logging.level.org.airsonic=INFO
 logging.level.liquibase=INFO
 logging.pattern.console=%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p){green} %clr(---){faint} %clr(%-40.40logger{32}){blue} %clr(:){faint} %m%n%wEx
 logging.pattern.file=%d{yyyy-MM-dd HH:mm:ss.SSS} %5p --- %-40.40logger{32} : %m%n%wEx
-DatabaseConfigType=embed
+DatabaseConfigType=legacy
 DatabaseConfigEmbedDriver=org.hsqldb.jdbcDriver
 DatabaseConfigEmbedUrl=jdbc:hsqldb:mem:airsonic
 DatabaseConfigEmbedUsername=sa
-DatabaseConfigEmbedPassword=
+DatabaseConfigEmbedPassword=