Seu arquivo * -ds.xml não está configurado corretamente. Experimente este formato:
<?xml version="1.0" encoding="UTF-8"?>
<datasources xmlns="http://www.jboss.org/ironjacamar/schema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.jboss.org/ironjacamar/schema http://docs.jboss.org/ironjacamar/schema/datasources_1_0.xsd">
<datasource jndi-name="java:jboss/datasources/secoundProjectDatasource" use-java-context="true">
<connection-url>jdbc:mysql://localhost:3306/database</connection-url>
<driver>mysql</driver>
<security>
<user-name>root</user-name>
<password>somePassword</password>
</security>
</datasource>
</datasources>