Update federation multirealm httpd template

[jagee]

This patch will resolve horizon OIDC users running into issues when logging out as one IDP user and then trying to login with a user from a different IDP before the first users OIDC session times out.

[openshift-ci]

Hi @jagee. Thanks for your PR.

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[jagee]

Tested this out here, note the deploy2 playbook failure was to cause it to fail for a autohold so i could test horizon over sshuttle manually.

https://gitlab.cee.redhat.com/ci-framework/ci-framework-testproject/-/merge_requests/1669
https://sf.apps.int.gpc.ocp-hub.prod.psi.redhat.com/zuul/t/components-integration/build/d602910b6d0748ea9e02e1bafeddbb6f

[HanzJas]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: HanzJas

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[danpawlik]

/ok-to-test