Refactor SP generation to simplify logout testing
    
    This adds the ability to quickly and easily add more SPs as needed
    to test more complex logout scenarios.
    
    Create five SP's, two of which support only HTTP-Redirect to ensure
    that logout works in a mixed environment.
    
    https://fedorahosted.org/ipsilon/ticket/59
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>