Finally I got it working.
<bean id="TrustedListSource"
class="eu.europa.ec.markt.dss.validation.tsl.ReloadableTrustListCertificateSource"
init-method="refresh">
<property name="tslLoader" ref="httpDataLoader" />
<property name="checkSignature" value="false"/>
</bean>
I have also included a modification on eu/europa/ec/markt/dss/validation/tsl/TrustedListsCertificateSource.java
184: TrustStatusList lotl = null;
try {
lotl = getTrustStatusList(lotlUrl, lotlCert);
// Added certificate load for custom LOTL
loadAllCertificatesFromOneTSL(lotl, true);
} catch (NotETSICompliantException e) {
LOG.severe("TSL not compliant with ETSI " + e.getMessage());
}
Regards