[SPARK-19673][SQL] "ThriftServer default app name is changed wrong"

## What changes were proposed in this pull request?
In spark 1.x ,the name of ThriftServer is SparkSQL:localHostName. While the ThriftServer default name is changed to the className of HiveThfift2 , which is not appropriate.

## How was this patch tested?
manual tests

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: lvdongr <lv.dongdong@zte.com.cn>

Closes #17010 from lvdongr/ThriftserverName.

sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLEnv.scala

@@ -40,6 +40,7 @@ private[hive] object SparkSQLEnv extends Logging {
       val maybeAppName = sparkConf
         .getOption("spark.app.name")
         .filterNot(_ == classOf[SparkSQLCLIDriver].getName)
+        .filterNot(_ == classOf[HiveThriftServer2].getName)
 
       sparkConf
         .setAppName(maybeAppName.getOrElse(s"SparkSQL::${Utils.localHostName()}"))