Fixes an issue with matching JSON bodies as bytes

[smfields]

Fixes an issue where body payloads would fail to be matched if the matcher was created using a byte[] value and the bytes represented valid JSON.

References

• Specifying .WithBody(byte[]) fails to match for JSON bodies #1338

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[StefH]

Can you add a new unit test for BodyDataMatchScoreCalculator which tests this scenario?

[smfields]

@StefH I added a few new tests.

RequestMessageBodyMatcher_GetMatchingScore_BodyTypeJson_BodyAsBytes_ExactObjectMapper is the one that directly covers the scenario this PR addresses.

The other two are for covering the existing scenario of matching non-JSON strings or bytes.