4 test failures for `master` due to default change (see https://github.com/FasterXML/jackson-databind/issues/3406)

So, looks like some tests need changes now that `DeserializationFeature.FAIL_ON_TRAILING_TOKENS` is enabled by default.
Databind had a few, mostly bad json in test (trailing quotes or duplicated ']` / `}` at the end).
Can also just ensure default for setting is `false` if that makes more sense.
