Upload datasource filename conflicts can prevent feed creation

1. Create a datasource for Upload. Choose /var/upload as location
2. Create Feed A and for Target choose to upload a sample file "userdata1.csv", define the schema and deploy the feed.
3. Create Feed B that differs in some way to Feed A: with different source location or different standardizers or storage parameters and runtimes.
4. For target upload the same sample file to /var/upload data source. Note the error:

Note: files previously uploaded to /var/upload are not browseable and cannot be used again.
Note: name chosen for upload cannot be changed from the name as it is found on local file system

Work Around: to upload the same data file for different uses in Kylo, you must rename the file on your local filesystem, or create more than one Upload location datasource.

Suggestion: keep name as metadata for the file and generate a unique ID in the Upload datasource location... or.. regenerate the ID/directory used for the upload for every screen where uploads are performed.
In this case the directory created was named "ee8f77ac-6d79-4820-ac3a-239d05c837e8" and then second time we uploaded it was still uploading to the "ee8f77..." directory.