FIX EZP-21104 Creating a session while already logged on with another should return a 409 error

According to the spec if an user, with an other already active session, log in with REST API the result must be a 409 error.
I did a minor change on the call of the ez.config.resolver service and it now seems to work.


Jira link : https://jira.ez.no/browse/EZP-21104