Test gradle.properties jvm args are used

[Arthurm1]

Adds a test case to check that jvmargs in gradle.properties are respected.

It's possible to set jvm args at various points of the tooling api. This checks they're being set in the ProjectConnection. If the tooling API spins off another process to retrieve the model and that doesn't use the same jvm args, then that wouldn't be tested for here.

Uses BuildEnvironment to check jvm args.

[jdneo]

So it turns out the jvm args are picked by gradle?

[jdneo]

@timreebow Could you share more information? Or is there any other way that we can leverage for testing?

[Arthurm1]

So it turns out the jvm args are picked by gradle?

It seems so. gradle/gradle#22856 seems to back that up it but also suggests that there is a priority order so I did wonder if they were being overwritten somewhere rather than not being used.