[GSS](7.1.z) SAML2STSLoginModule cannot be configured with module options instead of configFile

Description of problem:

It is not possible to configure the SAML2STSLoginModule by using module options instead of configFile:

<security-domain name="sts" cache-type="default">
<authentication>
<login-module code="org.picketlink.identity.federation.bindings.jboss.auth.SAML2STSLoginModule"
flag="required" module="org.picketlink">
<module-option name="serviceName" value="PicketLinkSTS"/>
<module-option name="portName" value="PicketLinkSTSPort"/>
<module-option name="endpointAddress" value="http://localhost:8080/picketlink-sts/PicketLinkSTS"/>
<module-option name="username" value="admin"/>
<module-option name="password" value="admin"/>

The issue appears to be caused by the following check:

diff --git picketlink-jbas-common/src/main/java/org/picketlink/identity/federation/bindings/jboss/auth/SAML2STSCommonLoginModule.java picketlink-jbas-common/src/main/java/org/picketlink/identity/federation/bindings/jboss/auth/SAML2STSCommonLoginModule.java
index bdadc40..deeef62 100644
— picketlink-jbas-common/src/main/java/org/picketlink/identity/federation/bindings/jboss/auth/SAML2STSCommonLoginModule.java
+++ picketlink-jbas-common/src/main/java/org/picketlink/identity/federation/bindings/jboss/auth/SAML2STSCommonLoginModule.java
@@ -346,10 +346,6 @@ public abstract class SAML2STSCommonLoginModule extends SAMLTokenFromHttpRequest
} else {
logger.trace("Local Validation is disabled. Verifying with STS");

• // sts config file has to be present to call STS (using sts client)
• if (this.stsConfigurationFile == null)
• throw logger.authSTSConfigFileNotFound();
  -
  // send the assertion to the STS for validation.
  STSClient client = this.getSTSClient();
  try { @@ -555,4 +551,4 @@ public abstract class SAML2STSCommonLoginModule extends SAMLTokenFromHttpRequest protected abstract TimeCacheExpiry getCacheExpiry() throws Exception; -}

  \ No newline at end of file
  +}

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Configure JBoss EAP 6.4.12 as described here: https://docs.jboss.org/author/display/PLINK/Protecting+EJB+Endpoints
2. Configure the SAML2STSLoginModule the module-option approach shown above (not the 'configFile' approach)
3. Deploy an ejb that is protected by the "ejb-remoting-sts" security-domain
4. Hit the ejb

Actual results:

Authentication fails

Expected results:

Authentication is successful

Additional info: