Can't deserialize to a bean that has Creator props

This patch adds a test for what ought to be a valid use case, using `ObjectReader.withValueToUpdate` on a bean class that has creator properties.

This issue contributed to FasterXML/jackson-module-scala#83, which I attempted to work around by inhibiting the "creator property"-ness of the particular property, but which then broke using creators for instantiation in some cases.

So, I need to revert my original "fix", but that leaves this issue open. I'll begin working on the solution, but any pointers you have will be helpful.