[SPARK-22279][SQL] Turn on spark.sql.hive.convertMetastoreOrc by default

Author: dongjoon-hyun

sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveUtils.scala

@@ -106,7 +106,7 @@ private[spark] object HiveUtils extends Logging {
     .doc("When set to true, the built-in ORC reader and writer are used to process " +
       "ORC tables created by using the HiveQL syntax, instead of Hive serde.")
     .booleanConf
-    .createWithDefault(false)
+    .createWithDefault(true)
 
   val HIVE_METASTORE_SHARED_PREFIXES = buildConf("spark.sql.hive.metastore.sharedPrefixes")
     .doc("A comma separated list of class prefixes that should be loaded using the classloader " +