ipatests: add Keycloak Bridge test
    
    Add test code for new bridge server (ipa-tuura) and Keycloak plugin.
    
    Add uninstall functions for create_keycloak.py so that the tests can
    be run repeatedly.
    
    Fixes: https://pagure.io/freeipa/issue/9227
    Signed-off-by: Scott Poore <spoore@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
    Reviewed-By: Anuja More <amore@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
    Reviewed-By: Anuja More <amore@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>