Check behavior without RPM installed

[JonnyOThan]

Got a report of a bunch of b9ps errors and it turned out they didn't have RPM installed.
message (38).txt

[JonnyOThan]

This may not make a lot of sense because currently on CKAN it seems to be impossible to install Reviva without RPM (MAS depends on ASET which depends on RPM). But in theory it should be fine.