use data_file_globs also for inter-step transfer, this needs additional *.tif glob when any warping happens

input dataxx/itemname gets uploaded to dataxx bucket as itemname (makes 
it possible to mimic old preprocessor this way in case no bucket set)
motivation in this commit is to AVOID data duplication in new bucket and 
dataxx buckets with possible reprocessing campaing

add product_exists method to check if 2 or more files in target and target.replace configuration default to false