[SPARK-3806][SQL] Minor fix for CliSuite

To fix two issues in CliSuite
1 CliSuite throw IndexOutOfBoundsException:
Exception in thread "Thread-6" java.lang.IndexOutOfBoundsException: 6
	at scala.collection.mutable.ResizableArray$class.apply(ResizableArray.scala:43)
	at scala.collection.mutable.ArrayBuffer.apply(ArrayBuffer.scala:47)
	at org.apache.spark.sql.hive.thriftserver.CliSuite.org$apache$spark$sql$hive$thriftserver$CliSuite$$captureOutput$1(CliSuite.scala:67)
	at org.apache.spark.sql.hive.thriftserver.CliSuite$$anonfun$4.apply(CliSuite.scala:78)
	at org.apache.spark.sql.hive.thriftserver.CliSuite$$anonfun$4.apply(CliSuite.scala:78)
	at scala.sys.process.ProcessLogger$$anon$1.out(ProcessLogger.scala:96)
	at scala.sys.process.BasicIO$$anonfun$processOutFully$1.apply(BasicIO.scala:135)
	at scala.sys.process.BasicIO$$anonfun$processOutFully$1.apply(BasicIO.scala:135)
	at scala.sys.process.BasicIO$.readFully$1(BasicIO.scala:175)
	at scala.sys.process.BasicIO$.processLinesFully(BasicIO.scala:179)
	at scala.sys.process.BasicIO$$anonfun$processFully$1.apply(BasicIO.scala:164)
	at scala.sys.process.BasicIO$$anonfun$processFully$1.apply(BasicIO.scala:162)
	at scala.sys.process.ProcessBuilderImpl$Simple$$anonfun$3.apply$mcV$sp(ProcessBuilderImpl.scala:73)
	at scala.sys.process.ProcessImpl$Spawn$$anon$1.run(ProcessImpl.scala:22)

Actually, it is the Mutil-Threads lead to this problem.

2 Using ```line.startsWith``` instead ```line.contains``` to assert expected answer. This is a tiny bug in CliSuite, for test case "Simple commands", there is a expected answers "5", if we use ```contains``` that means output like "14/10/06 11:```5```4:36 INFO CliDriver: Time taken: 1.078 seconds" or "14/10/06 11:54:36 INFO StatsReportListener: 	0%	```5```%	10%	25%	50%	75%	90%	95%	100%" will make the assert true.

Author: scwf <wangfei1@huawei.com>

Closes #2666 from scwf/clisuite and squashes the following commits:

11430db [scwf] fix-clisuite

1 files changed, 5 insertions, 3 deletions

diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
index 3475c2c9db..d68dd090b5 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
@@ -62,9 +62,11 @@ class CliSuite extends FunSuite with BeforeAndAfterAll with Logging {
 
     def captureOutput(source: String)(line: String) {
       buffer += s"$source> $line"
-      if (line.contains(expectedAnswers(next.get()))) {
-        if (next.incrementAndGet() == expectedAnswers.size) {
-          foundAllExpectedAnswers.trySuccess(())
+      if (next.get() < expectedAnswers.size) {
+        if (line.startsWith(expectedAnswers(next.get()))) {
+          if (next.incrementAndGet() == expectedAnswers.size) {
+            foundAllExpectedAnswers.trySuccess(())
+          }
         }
       }
     }