Spring Cloud Contract 5 (finally) migrates to spring.cloud.contract property prefix

TLDR; Spring Cloud Contract 5 will no longer support the stubrunner prefix for properties - you need to migrate to spring.cloud.contract.stubrunner. Check this PR for more information.

The Problem

Since the very beginning of the project, when it was still called Accurest, the Spring properties to configure Accurest started with stubrunner. To ease the migration process we have left the original property prefix as it was so Spring Cloud Contract was the only project that did not have the proper spring.cloud prefix. Now it’s about time to change that!

The Solution

With that PR we’re migrating all properties from the stubrunner prefix to spring.cloud.contract.stubrunner. The migration should be very simple - plain find and replace.