Run tests using the client mode JVM (or as close as we can get to it)
until 2.99 has a version we want to set this against 2.14 builds
Merge pull request #279 from rspec/jruby_tweaks_for_299_and_lock_build_to_214

Jruby tweaks for 2-99-maintenance also pair this branch to 2-99 on other repos