Added code to call Runner's done() method in both InProcess and SubProcess cases.

testing/agent/src/main/java/sbt/ForkMain.java

@@ -212,6 +212,7 @@ public class ForkMain {
 				final Runner runner = framework.runner(frameworkArgs, remoteFrameworkArgs, getClass().getClassLoader());
 				for (ForkTestDefinition test : filteredTests)
 					runTestSafe(test, runner, loggers, os);
+				runner.done();
 			}
 			write(os, ForkTags.Done);
 			is.readObject();