Add a configuration property for configuring Spring Data MongoDB's BigDecimal representation

[wilkinsona]

Chatting with @mp911de, it would be useful for Boot to provide a configuration property for Spring Data MongoDB's BigDecimal representation as the default has changed and users may want to change it back. Providing a property will make it easier for them to do so.

[mp911de]

Related ticket in Spring Data: spring-projects/spring-data-mongodb#5037

[wilkinsona]

We should probably look at #34954 before tackling this.

[HyunSangHan]

Hi,
I’ve noticed that spring-data-mongodb has recently changed its default for BigDecimal representation. As I understand it, spring-boot would keep that new default but provide a configuration property so that users can easily override it if they prefer the previous behavior.

I’m aware of the context on the Spring Data side. Once the issue mentioned by @wilkinsona is resolved, I’d be happy to give this a try. :)