cloud/atomic: give appropriate factory-parameters to koji
    
    In koji there are ova-options and also factory-parameters.
    We can pass ova-options to koji and also factory-parameters
    but we can't pass ova-options as a factory-parameter. We just
    need to pass in the vagrant_sync_directory as a factory
    parameter.
    
    Fixes https://pagure.io/atomic-wg/issue/181
    
    Signed-off-by: Dusty Mabe <dusty@dustymabe.com>