Enable gazelle IUA simulator testing

[oliveregger]

We would like to test the IUA simulator of Gazelle, however the redirect cannot contain a Hash as we use it today (invalid in OAuth spec).

For the redirect_url, this is an issue we have with Keycloak not allowing certain special characters in the redirect uri of a client.

This is due to the # being an uri fragment and not being allowed by the Oauth2 standard (see rfc 6749 section 3.1.2)

current configuration in IUA is

client-id: cd8455fc-e294-465a-8c86-35ae468c6b2f
redirect: https://test.ahdis.ch/mag-test/#/mag

see [epd_projectathon] CH:IUA testable for the preProjectathon !