Odd test failures after fixing databind issue 5045 (wrt default creator)

[cowtowncoder]

After fixing FasterXML/jackson-databind#5045 one Kotlin test class, Github722 starts failing. From exception it looks as if there was @JsonCreator annotated 0-params constructor, in addition to declared 2-parameter one -- this is odd.
I can only speculate Kotlin might synthesize such a constructor, although nothing I've read supports such hypothesis.

@k163377 Sorry to bug you but I was hoping you might be able to help here -- hoping to resolve this to unblock 3.0.0-rc10 release.

[k163377]

After analysis, it was confirmed that the 0-params constructor was indeed being generated.
Therefore, the test has been modified.

However, since this could cause inconvenient situations when using Jackson, I plan to file an issue with the Kotlin project.