Payload with newlines should not place newlines in the waf-evaluation-report-ccyy-month-hh-mm-ss.csv report

[paul-hammant]

(export.go) A CSV row should be in a single line, not multiple line. Yet, this testcase - https://github.com/wallarm/gotestwaf/blob/master/testcases/community/community-xxe.yml - will create multiple broken-csv lines

Fields are: "Payload",
"Check Status",
"Response Code",
"Placeholder",
"Encoder",
"Set",
"Case",
"Test Result",

Note: Payload can place a unknown number of commas in the CSV for the "payload" field. Coders machine reading the csv output can overcome that, so it's less important. Spurious newlines will be impossible to overcome.