Spring configuration clean-up

* Regrouped component definitions into one single file per package in
most cases, with a few exceptions

* Added documentation about how the configuration is stored and which
guidelines should be followed when adding or modifying Spring component
configurations.

legacyworlds-server-data/src/main/resources/configuration/transaction-bean.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:tx="http://www.springframework.org/schema/tx"
-	xsi:schemaLocation="
-                        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
-                        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
-
-	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
-		<property name="dataSource" ref="dataSource" />
-	</bean>
-
-	<tx:annotation-driven transaction-manager="transactionManager"/>
-
-</beans>