Fix wrong system property being set.

This was added by the fix to SPARK-2668: a stray equal sign was
creating a bad system property, and the Jetty initialization
code was tripping on it.

Also fixed a "MatchError" that could be hit in ApplicationMaster.

Author: Marcelo Vanzin

yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala

@@ -401,17 +401,17 @@ private[spark] class ApplicationMaster(args: ApplicationMasterArguments,
           // it has an uncaught exception thrown out.  It needs a shutdown hook to set SUCCEEDED.
           status = FinalApplicationStatus.SUCCEEDED
         } catch {
-          case e: InvocationTargetException => {
+          case e: InvocationTargetException =>
             e.getCause match {
-              case _: InterruptedException => {
+              case _: InterruptedException =>
                 // Reporter thread can interrupt to stop user class
-              }
+
+              case e => throw e
             }
-          }
         } finally {
           logDebug("Finishing main")
+          finalStatus = status
         }
-        finalStatus = status
       }
     }
     userClassThread.setName("Driver")

yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala

@@ -348,7 +348,7 @@ private[spark] trait ClientBase extends Logging {
     }
 
     // For log4j configuration to reference
-    javaOpts += "-D=spark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR
+    javaOpts += ("-Dspark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR)
 
     val userClass =
       if (args.userClass != null) {

yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ExecutorRunnableUtil.scala

@@ -98,7 +98,7 @@ trait ExecutorRunnableUtil extends Logging {
     */
 
     // For log4j configuration to reference
-    javaOpts += "-D=spark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR
+    javaOpts += ("-Dspark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR)
 
     val commands = Seq(Environment.JAVA_HOME.$() + "/bin/java",
       "-server",