Description of problem:

To reduce the amount of file system objects that has to be tracked by the deployment and to enable HA setups to work with rh_cloud plugin, we need to stop using filesystem objects.

One of these objects is inventory upload related tasks output

How reproducible:

Always

Steps to Reproduce:
1. Generate and upload a report in rh_cloud
2. Take a look at the filesystem under red_hat_inventory/outputs folder

Actual results:

report_for_* and upload_for_* files exist

Expected results:

No files exist, but the page shows the correct output and status