Exception throws when ErrorPage or IndexPage properties are not configured in the configuration file

[anusharp]

Description:
Below exception throws when ErrorPage property is not configured in the configuration file at the logout
java.lang.IllegalArgumentException: Path [samlsso?SAML2.HTTPBinding=HTTP-POST] does not start with a "/" character

Suggested Labels:

SAML,SLO,Tomcat
Suggested Assignees:

Affected Product Version:
sgardio-java-oidc-sdk release version 0.1.16
OS, DB, other environment details and versions:
WSO2 IAM 5.10.0, Tomcat 9.0

Steps to reproduce:

1. Setup asgardio tomcat sample app : https://github.com/asgardio/asgardio-tomcat-saml-agent/tree/master/io.asgardio.tomcat.saml.agent.sample by using asgardio-java-oidc-sdk release version 0.1.16
2. Remove below properties from the sample-app.properties
   IndexPage=/sample-app/index.html
   ErrorPage=/error.jsp
3. Check the logout flow