declare data source and driver for cassandra jdbc driver

standalone.xml

<subsystem xmlns="urn:jboss:domain:datasources:1.0">
  <datasources>
    <datasource jndi-name="java:jboss/datasources/ExampleDS" pool-name="ExampleDS" enabled="true" 
                use-java-context="true">
      <connection-url>jdbc:h2:mem:test;DB_CLOSE_DELAY=-1</connection-url>
      <driver>h2</driver>
      <security>
        <user-name>sa</user-name>
        <password>sa</password>
      </security>
    </datasource>
    <datasource jndi-name="java:jboss/datasources/CassandraDS" pool-name="CassandraDS" enabled="true" 
                use-java-context="true" use-ccm="false" jta="false">
      <connection-url>jdbc:cassandra://localhost:9160/system?version=3.0.0</connection-url>
      <driver>cassandra</driver>
    </datasource>
    <drivers>
      <driver name="h2" module="com.h2database.h2">
        <xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
      </driver>
      <driver name="cassandra" module="org.apache-extras.cassandra-jdbc">
        <datasource-class>org.apache.cassandra.cql.jdbc.CassandraDataSource</datasource-class>
      </driver>
    </drivers>
  </datasources>
</subsystem>