[SD-665] AFP Ingestion

Here I tried to follow the workflow in the document:
https://wiki.sourcefabric.org/display/NR/Ingest+Providers

So every succesfully processed file should move into _PROCESSED folder in the ingest path. Any failures will be copied to _ERROR folder. If the folders do not exist the system will try to create the folders. But I am not 100% sure if this will work in the test environment. I don't know if there's enough permissions in place to move the folders as well.