[JAVA-2306] Moved articles from spring-persistence-simple

* https://www.baeldung.com/the-persistence-layer-with-spring-and-jpa went into spring-jpa-2

* https://www.baeldung.com/hibernate-5-spring went to spring-jpa-2

* https://www.baeldung.com/transaction-configuration-with-jpa-and-spring went to spring-jpa-2

* https://www.baeldung.com/persistence-layer-with-spring-and-hibernate went to spring-jpa-2

* https://www.baeldung.com/simplifying-the-data-access-layer-with-spring-and-java-generics went to spring-jpa-2

* https://www.baeldung.com/the-persistence-layer-with-spring-data-jpa went to spring-data-jpa-repo-2

* https://www.baeldung.com/spring-data-jpa-query went to spring-data-jpa-query-2

* https://www.baeldung.com/spring-jdbc-jdbctemplate moved to spring-jdbc

* Removed spring-persistence-simple module as all articles have been moved

persistence-modules/pom.xml

@@ -70,6 +70,7 @@
         <module>spring-data-jpa-query</module>
         <module>spring-data-jpa-query-2</module>
         <module>spring-data-jpa-repo</module>
+        <module>spring-data-jpa-repo-2</module>
 
         <module>spring-data-jdbc</module>
 
@@ -83,8 +84,8 @@
         <module>spring-hibernate4</module>
         <module>spring-jpa</module>
         <module>spring-jpa-2</module>
+        <module>spring-jdbc</module>
         <!-- <module>spring-mybatis</module> --> <!-- needs fixing in BAEL-9021 -->
-        <module>spring-persistence-simple</module>
         <module>spring-persistence-simple-2</module>
     </modules>