title: PingFederate: SP-Initiated single logout 'SLO' with opentoken adapter
body: <p>When doing an sp-initiated SLO while configuring an opentoken adapter for the IdP. I don't get to go to the adapter configured SLO-Service, what actually happens is that I go to the logout endpoint of the SP and that's it, I am not redirected to the SLO Service in the Adapter.</p>
  
  <p>Noting that if I do an Idp-Initiated SLO fine in other scenarios however in this specific SP I am disabling the idp-initiating SLO. should I send any extra information to the idp? is this a normal behavior?</p>