Process exceptions when talking to Dogtag
    
    The problem is the ca_status() uses an HTTP GET operation to check Dogtag's
    status. Under some circumstances Dogtag may take a long time to respond, so the
    HTTP GET may time out much earlier than 2 minutes. And since the above code
    doesn't catch the exception, the whole loop fails immediately, so it doesn't
    wait for a full 2 minutes as expected.
    
    https://fedorahosted.org/freeipa/ticket/3492