[SPARK-1570] Fix classloading in JavaSQLContext.applySchema

I think I hit a class loading issue when running JavaSparkSQL example using spark-submit in local mode.

Author: Kan Zhang <kzhang@apache.org>

Closes #484 from kanzhang/SPARK-1570 and squashes the following commits:

feaaeba [Kan Zhang] [SPARK-1570] Fix classloading in JavaSQLContext.applySchema

Author: kanzhang

sql/core/src/main/scala/org/apache/spark/sql/api/java/JavaSQLContext.scala

@@ -28,6 +28,7 @@ import org.apache.spark.sql.catalyst.expressions.{AttributeReference, GenericRow
 import org.apache.spark.sql.catalyst.types._
 import org.apache.spark.sql.parquet.ParquetRelation
 import org.apache.spark.sql.execution.{ExistingRdd, SparkLogicalPlan}
+import org.apache.spark.util.Utils
 
 /**
  * The entry point for executing Spark SQL queries from a Java program.
@@ -84,10 +85,11 @@ class JavaSQLContext(sparkContext: JavaSparkContext) {
    */
   def applySchema(rdd: JavaRDD[_], beanClass: Class[_]): JavaSchemaRDD = {
     val schema = getSchema(beanClass)
-    val className = beanClass.getCanonicalName
+    val className = beanClass.getName
     val rowRdd = rdd.rdd.mapPartitions { iter =>
       // BeanInfo is not serializable so we must rediscover it remotely for each partition.
-      val localBeanInfo = Introspector.getBeanInfo(Class.forName(className))
+      val localBeanInfo = Introspector.getBeanInfo(
+        Class.forName(className, true, Utils.getContextOrSparkClassLoader))
       val extractors =
         localBeanInfo.getPropertyDescriptors.filterNot(_.getName == "class").map(_.getReadMethod)