Replay tests can't handle duplicate headers with different values

[jasmine-nahrain]

Replay files seem to search for the first header when testing and assume that is the intended value. This is fine except for duplicate headers.

E.g.
X-Duplicate-Header: same
X-Duplicate-Header: other

It would then fail like this
[INFO]: Equals Violation: Different. Key: "fill_1", Field Name: "x-duplicate-header", Correct Value: "other", Actual Value: "same" : 26

Despite that other is the intended value for the second duplicate header