Morphia application to reproduce error with capped entities

This repository was created in regards to bug issue MorphiaOrg/morphia#3454 at Morphia github.

Steps to reproduce issue

1. Start a Mongodb database locally on your computer (mongodb-community-server 8.0.9 was used when this issue was created)
2. Clone this project and run the Morphia250TestApplication class
3. Wait for the application to start up and finish
4. Start application again
5. This time the application should fail because of a java.lang.ClassCastException