ipatests: verify that getcert output includes the issued date
    
    certmonger 0.79.14 included a new feature that provides the
    NotBefore (or issued) date to the certificate list output.
    
    Verify that it is present in the output.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1940261
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>