Add conditional deletion to sub-file
Add conditional deletion to sub-file

That test was passing if the file existed in the first place. Now
following the conditional delete from another example (update.ecl).

afishbeck/HPCC-Platform,afishbeck/HPCC-Platform,afishbeck/HPCC-Platform,afishbeck/HPCC-Platform,afishbeck/HPCC-Platform,afishbeck/HPCC-Platform