Merge pull request #343 from pwendell/build-fix

Fix test breaking downstream builds

This wasn't detected in the pull-request-builder because it manually sets SPARK_HOME. I'm going to change that (it should't do this) to make it like the other builds.

core/src/test/scala/org/apache/spark/deploy/worker/ExecutorRunnerTest.scala

@@ -26,7 +26,7 @@ import org.apache.spark.deploy.{ExecutorState, Command, ApplicationDescription}
 class ExecutorRunnerTest extends FunSuite {
   test("command includes appId") {
     def f(s:String) = new File(s)
-    val sparkHome = sys.env.get("SPARK_HOME").orElse(sys.env.get("spark.home")).get
+    val sparkHome = sys.env.get("SPARK_HOME").orElse(sys.props.get("spark.home")).get
     val appDesc = new ApplicationDescription("app name", 8, 500, Command("foo", Seq(),Map()),
       sparkHome, "appUiUrl")
     val appId = "12345-worker321-9876"