[SPARK-7489] [SPARK SHELL] Spark shell crashes when compiled with scala 2.11

Spark shell crashes when compiled with scala 2.11 and  SPARK_PREPEND_CLASSES=true

There is a similar Resolved JIRA issue -SPARK-7470 and a PR https://github.com/apache/spark/pull/5997 , which handled same issue only in scala 2.10

Author: vinodkc <vinod.kc.in@gmail.com>

Closes #6013 from vinodkc/fix_sqlcontext_exception_scala_2.11 and squashes the following commits:

119061c [vinodkc] Spark shell crashes when compiled with scala 2.11

repl/scala-2.11/src/main/scala/org/apache/spark/repl/Main.scala

@@ -88,7 +88,7 @@ object Main extends Logging {
       logInfo("Created sql context (with Hive support)..")
     }
     catch {
-      case cnf: java.lang.ClassNotFoundException =>
+      case _: java.lang.ClassNotFoundException | _: java.lang.NoClassDefFoundError =>
         sqlContext = new SQLContext(sparkContext)
         logInfo("Created sql context..")
     }