Some tests are failing under Java 21

[ryanprayogo]

Some tests that are using Mockito are failing under Java 21 with this error

Cannot call abstract real method on java object!
Calling real methods is only possible when mocking non abstract method.

This seem to be caused by an open issue in Mockito.

There is a workaround available (set the net.bytebuddy.experimental system property to true), which can be set in the unit tests' @BeforeAll annotated method.

Steps to reproduce:

• Use Java 21 (reproducible with Temurin JDK 21.0.4)
• Run mvn clean test
• Observe failures

[Mehamoodshaik]

Try to add maven-surefire-plugin with net.bytebuddy.experimental to be set true

[toddbaert]

Oh man... this will save me a lot of time! TBH I never tried to troubleshoot this, I just temporarily switched to Java 8.

[ryanprayogo]

I have the fix in #1060

I originally added the said system property in this commit but end up using the more recent (minor) version of byte-buddy(-agent) instead (see discussion in the PR).