Issue #1006

Fix for #1006.

We ask Geoserver to only send us only the specific columns we need. This means that the columns which aren't being properly escaped for CSV will not be returned and will not break the download estimator calculation.

Change is basically here (line 95): https://github.com/aodn/aodn-portal/commit/5ca64770f615fdc9118e2c20de7b012285bdf98a#diff-18d380fd9102ae49072738b19703d9d4R95