Address feedback on javadoc and putAll

frontend/src/main/scala/bloop/exec/ForkProcess.scala

@@ -40,6 +40,7 @@ final case class ForkProcess(javaEnv: JavaEnv, classpath: Array[AbsolutePath]) {
    * @param className      The fully qualified name of the class to run.
    * @param args           The arguments to pass to the main method.
    * @param logger         Where to log the messages from execution.
+   * @param properties     The environment properties to run the program with.
    * @param extraClasspath Paths to append to the classpath before running.
    * @return 0 if the execution exited successfully, a non-zero number otherwise.
    */
@@ -49,6 +50,7 @@ final case class ForkProcess(javaEnv: JavaEnv, classpath: Array[AbsolutePath]) {
               logger: Logger,
               env: Properties,
               extraClasspath: Array[AbsolutePath] = Array.empty): Int = {
+    import scala.collection.JavaConverters.{propertiesAsScalaMap, mapAsJavaMapConverter}
     val fullClasspath = classpath ++ extraClasspath
 
     val java = javaEnv.javaHome.resolve("bin").resolve("java")
@@ -71,7 +73,7 @@ final case class ForkProcess(javaEnv: JavaEnv, classpath: Array[AbsolutePath]) {
       processBuilder.directory(cwd.toFile)
       val processEnv = processBuilder.environment()
       processEnv.clear()
-      env.forEach { case (k: String, v: String) => processEnv.put(k, v); () }
+      processEnv.putAll(propertiesAsScalaMap(env).asJava)
       val process = processBuilder.start()
       val processLogger = new ProcessLogger(logger, process)
       processLogger.start()

frontend/src/main/scala/bloop/testing/TestInternals.scala

@@ -68,6 +68,7 @@ object TestInternals {
    * @param discoveredTests The tests that were discovered.
    * @param eventHandler    Handler that reacts on messages from the testing frameworks.
    * @param logger          Logger receiving test output.
+   * @param env             The environment properties to run the program with.
    */
   def executeTasks(cwd: AbsolutePath,
                    fork: ForkProcess,