Fix error "Type must be "Systems" when importing Processes on admin dashboard #61880112

Per [story 61880112](https://www.pivotaltracker.com/story/show/61880112).  System and Process use same converter; there was one other place it needed to check which of the type object types it is, but was not checking until this fix.  Possibly a better way to refactor this, but current PR does the job.