support top parameter field in tsv input file

[mobaniha]

Purpose

• ...

Current batch testing didn't support top parameter to be considered while getting answers while it's exist in the documentation as input
https://docs.microsoft.com/en-us/azure/cognitive-services/qnamaker/reference-tsv-format-batch-testing#tsv-input-fields

Does this introduce a breaking change?

[ ] Yes
[ x] No

Pull Request Type

What kind of change does this Pull Request introduce?
putting the code mainly into foreach loop to consider all returned answers, not just the first one

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code
  call the same command line, you will start getting more answers for the same question, like (1.1, 1.2, 1.3) based on top parameter in input file

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

batchtesting.exe in.tsv https://.azurewebsites.net ENDPOINT-KEY out.tsv

What to Check

Verify that the following are valid

• ...

Other Information

[ghost]

All CLA requirements met.