Reuse appInfo

Author: markhamstra

core/src/main/scala/org/apache/spark/deploy/master/Master.scala

@@ -312,7 +312,7 @@ private[spark] class Master(
               if (appInfo.incrementRetryCount() < ApplicationState.MAX_NUM_RETRY) {
                 schedule()
               } else {
-                val execs = idToApp(appId).executors.values
+                val execs = appInfo.executors.values
                 if (!execs.exists(_.state == ExecutorState.RUNNING)) {
                   logError(s"Application ${appInfo.desc.name} with ID ${appInfo.id} failed " +
                     s"${appInfo.retryCount} times; removing it")