At the moment the file contents are not persisted by checked in
memory.
The first and last three records are show if all are valid.
If there are invalid rows, they are reported and the user is
prompted to go back and sort out upload file.
The storing of upload result (i.e. validation of file) in session
will be removed in next story which is about persisting of file
for later processing.
These are basic tests to make sure that the pages stay stitched together.
Added for both the jobs and send SMS flows (because the send SMS flow didn’t
have any before)
