Moved persistence.xml and testrealm.json for example from webapp/META-INF to resources/META-INF - and changed persistence.xml to use a datasource

examples/as7-eap-demo/server/src/main/resources/META-INF/persistence.xml

@@ -3,8 +3,8 @@
     xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
     version="1.0">
     <persistence-unit name="keycloak-identity-store" transaction-type="RESOURCE_LOCAL">
-        <provider>org.hibernate.ejb.HibernatePersistence</provider>
-
+        <jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
+        
         <class>org.picketlink.idm.jpa.model.sample.simple.AttributedTypeEntity</class>
         <class>org.picketlink.idm.jpa.model.sample.simple.AccountTypeEntity</class>
         <class>org.picketlink.idm.jpa.model.sample.simple.RoleTypeEntity</class>
@@ -22,12 +22,8 @@
         <class>org.keycloak.services.models.picketlink.mappings.ResourceEntity</class>
 
         <exclude-unlisted-classes>true</exclude-unlisted-classes>
-
+        
         <properties>
-            <property name="hibernate.connection.url" value="jdbc:h2:mem:test"/>
-            <property name="hibernate.connection.driver_class" value="org.h2.Driver"/>
-            <property name="hibernate.connection.username" value="sa"/>
-            <property name="hibernate.connection.password" value=""/>
             <property name="hibernate.hbm2ddl.auto" value="create-drop" />
             <property name="hibernate.show_sql" value="false" />
             <property name="hibernate.format_sql" value="false" />