[SPARK-7399] Spark compilation error for scala 2.11

Subsequent fix following #5966. I tried this out locally.

Author: Andrew Or <andrew@databricks.com>

Closes #6129 from andrewor14/211-compilation and squashes the following commits:

713868f [Andrew Or] Fix compilation issue for scala 2.11

core/src/main/scala/org/apache/spark/rdd/RDD.scala

@@ -1524,7 +1524,7 @@ abstract class RDD[T: ClassTag](
    * doCheckpoint() is called recursively on the parent RDDs.
    */
   private[spark] def doCheckpoint(): Unit = {
-    RDDOperationScope.withScope(sc, "checkpoint", false, true) {
+    RDDOperationScope.withScope(sc, "checkpoint", allowNesting = false, ignoreParent = true) {
       if (!doCheckpointCalled) {
         doCheckpointCalled = true
         if (checkpointData.isDefined) {

core/src/main/scala/org/apache/spark/rdd/RDDOperationScope.scala

@@ -96,7 +96,7 @@ private[spark] object RDDOperationScope {
       sc: SparkContext,
       allowNesting: Boolean = false)(body: => T): T = {
     val callerMethodName = Thread.currentThread.getStackTrace()(3).getMethodName
-    withScope[T](sc, callerMethodName, allowNesting)(body)
+    withScope[T](sc, callerMethodName, allowNesting, ignoreParent = false)(body)
   }
 
   /**
@@ -116,7 +116,7 @@ private[spark] object RDDOperationScope {
       sc: SparkContext,
       name: String,
       allowNesting: Boolean,
-      ignoreParent: Boolean = false)(body: => T): T = {
+      ignoreParent: Boolean)(body: => T): T = {
     // Save the old scope to restore it later
     val scopeKey = SparkContext.RDD_SCOPE_KEY
     val noOverrideKey = SparkContext.RDD_SCOPE_NO_OVERRIDE_KEY

core/src/test/scala/org/apache/spark/rdd/RDDOperationScopeSuite.scala

@@ -61,11 +61,11 @@ class RDDOperationScopeSuite extends FunSuite with BeforeAndAfter {
     var rdd1: MyCoolRDD = null
     var rdd2: MyCoolRDD = null
     var rdd3: MyCoolRDD = null
-    RDDOperationScope.withScope(sc, "scope1", allowNesting = false) {
+    RDDOperationScope.withScope(sc, "scope1", allowNesting = false, ignoreParent = false) {
       rdd1 = new MyCoolRDD(sc)
-      RDDOperationScope.withScope(sc, "scope2", allowNesting = false) {
+      RDDOperationScope.withScope(sc, "scope2", allowNesting = false, ignoreParent = false) {
         rdd2 = new MyCoolRDD(sc)
-        RDDOperationScope.withScope(sc, "scope3", allowNesting = false) {
+        RDDOperationScope.withScope(sc, "scope3", allowNesting = false, ignoreParent = false) {
           rdd3 = new MyCoolRDD(sc)
         }
       }
@@ -84,11 +84,13 @@ class RDDOperationScopeSuite extends FunSuite with BeforeAndAfter {
     var rdd1: MyCoolRDD = null
     var rdd2: MyCoolRDD = null
     var rdd3: MyCoolRDD = null
-    RDDOperationScope.withScope(sc, "scope1", allowNesting = true) { // allow nesting here
+    // allow nesting here
+    RDDOperationScope.withScope(sc, "scope1", allowNesting = true, ignoreParent = false) {
       rdd1 = new MyCoolRDD(sc)
-      RDDOperationScope.withScope(sc, "scope2", allowNesting = false) { // stop nesting here
+      // stop nesting here
+      RDDOperationScope.withScope(sc, "scope2", allowNesting = false, ignoreParent = false) {
         rdd2 = new MyCoolRDD(sc)
-        RDDOperationScope.withScope(sc, "scope3", allowNesting = false) {
+        RDDOperationScope.withScope(sc, "scope3", allowNesting = false, ignoreParent = false) {
           rdd3 = new MyCoolRDD(sc)
         }
       }
@@ -107,11 +109,11 @@ class RDDOperationScopeSuite extends FunSuite with BeforeAndAfter {
     var rdd1: MyCoolRDD = null
     var rdd2: MyCoolRDD = null
     var rdd3: MyCoolRDD = null
-    RDDOperationScope.withScope(sc, "scope1", allowNesting = true) {
+    RDDOperationScope.withScope(sc, "scope1", allowNesting = true, ignoreParent = false) {
       rdd1 = new MyCoolRDD(sc)
-      RDDOperationScope.withScope(sc, "scope2", allowNesting = true) {
+      RDDOperationScope.withScope(sc, "scope2", allowNesting = true, ignoreParent = false) {
         rdd2 = new MyCoolRDD(sc)
-        RDDOperationScope.withScope(sc, "scope3", allowNesting = true) {
+        RDDOperationScope.withScope(sc, "scope3", allowNesting = true, ignoreParent = false) {
           rdd3 = new MyCoolRDD(sc)
         }
       }