Enhance JaCoCo Agent Configuration

[billy-briggs-dev]

Related issue: https://github.com/cloudfoundry/java-buildpack/pull/1115

While working with Jacoco Agent, I ran into issues trying to configure it for my company's use case. This PR just expands the implementation to support the full JaCoCo Agent interface as listed in their documentation:

https://www.eclemma.org/jacoco/trunk/doc/agent.html

Would appreciate any/all feedback!