Attempt to address csv output bug with flush command

[m3brown]

This is an attempt to address #209, which describes how some CSV exports have an incorrect number of records.

It was noticed that when an export is incorrect, the last line is incomplete. Below is a sample of the last two lines:

"98.18000030517578","","9875","4.159999847412109","3280","4000","160","58300","73","South Carolina","SC","0028728","22-3887207","Ginnie Mae (GNMA)","One-to-four family dwelling (other than manufactured housing)","Not applicable","Owner-occupied as a principal dwelling","Greenville, Mauldin, Easley - SC","VA-guaranteed","Refinancing","Secured by a first lien","Not a HOEPA loan","","","","","Pickens County","Female","","","","","White","Not Hispanic or Latino","0106.00","2011","0","Male","","","","","White","Not Hispanic or Latino","Department of Housing and Urban Development","HUD","Loan originated"
"144.08999633789062","01.75","6651","9.739999771118164","2365","2649","217","73300","92","New Jersey","NJ","0027536","22-3887207","Ginnie Mae (GNMA)","One-to-four family dwelling (other than manufactured housing)","Not applicable","Owner-occupied as a principal dwelling","Allentown, Bethlehem, Easton - PA, NJ","VA-guar

In the event that this is a buffering issue, this PR adds a (flush) comand after writing the csv. I was unable to recreate the issue in my development environment, so I'm not sure this will fix the issue.

[mehtadev17]

+1. If attempt does not fix the issue, then we will revert this change.

[marcesher]

What kind of testing did you all do to lend you to believe that this would fix the issue?

[m3brown]

Unfortunately we still haven't been able to recreate the issue in our local environments, so it really was a desperate attempt/test based on the fact that the stream ends unexpectedly mid line (see the sample in my original comments).

If by what kind of testing you mean ... because this actually breaks write-csv that's a good observation. The initial commit worked (i.e. had no positive or negative impact) in dev because it was missing a parentheses. The second commit resulted in empty CSV files but I didn't notice that until after this was merged. It has since been reverted

Note - I have since noticed a way to test changes in demo without first commiting to master (i.e. bypassing jenkins) so this kind of experiment shouldn't be happening in the future.