Include JVM Arguments in the Workload Key

[eostermueller]

The "Workload Key" is a json blob of text that defines the current code that's running.
With a little work, JVM parameters (like gc configuration, classloader configuration, other -D parameters) could be added.

When a "Workload Key" contained JVM parameters, there are some important considerations:

• JVM would need to be restarted, which can take several seconds
• Must detect JVM parameters not supported by the "currently configured" JDK. For example, if you've specified G1 GC parameters in a 1.6jdk...the JVM might not even start.
• Which JVMs will users be able to specify parameters for? Of course, the SUT would be the highest priority. But what about JVM running H2? What about the JVM running wiremock?