Blue-Ridge spawns a new JVM for each test file

[dmcinnes]

It would be nice if it could run in a single instance of the JVM since startup time is a big issue.
gleneivey has a branch that did this but it seems his latest merge from relevance/blue-ridge broke that behavior.
Thanks!

[gleneivey]

Hi. My "test-in-one-jvm" and "local" branches both (still) "work for me". Could you let me know where exactly you pulled from and what changed from "before" to now? -- glen

[dmcinnes]

Oh I bet I know what went wrong!
We're using braid to hook in the plugin and I think the blue-ridge remote was still pointing to the relevance fork. I couldn't for the life of me pull in an older version of your branch until I removed that remote definition even though I was giving your branch's github URL.

Nice work by the way! It runs way faster.