[KYUUBI #2510] Fix NPE when invoking YarnApplicationOperation::getApplicationInfoByTag

### _Why are the changes needed?_

null value might be returned for YarnApplicationOperation::getApplicationInfoByTag

I met NPE issue yesterday.

<img width="1061" alt="image" src="https://user-images.githubusercontent.com/6757692/165871836-ad1e4290-34ee-4941-9463-6cc4384f502e.png">
<img width="1329" alt="image" src="https://user-images.githubusercontent.com/6757692/165871885-3b216dda-ab4f-4663-966d-15c0be5f110f.png">

Here the state might be null, because Some(null) is nonEmpty.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #2510 from turboFei/batch_npe.

Closes #2510

32cad24 [Fei Wang] refactor
f0e5f11 [Fei Wang] fix current ut
f037d44 [Fei Wang] fix npe when getting ApplicationInfo

Authored-by: Fei Wang <fwang12@ebay.com>
Signed-off-by: Fei Wang <fwang12@ebay.com>

Author: turboFei

kyuubi-server/src/main/scala/org/apache/kyuubi/engine/KyuubiApplicationManager.scala

@@ -78,7 +78,11 @@ class KyuubiApplicationManager extends AbstractService("KyuubiApplicationManager
   def getApplicationInfo(
       clusterManager: Option[String],
       tag: String): Option[Map[String, String]] = {
-    operations.find(_.isSupported(clusterManager)).map(_.getApplicationInfoByTag(tag))
+    val operation = operations.find(_.isSupported(clusterManager))
+    operation match {
+      case Some(op) => Option(op.getApplicationInfoByTag(tag))
+      case None => None
+    }
   }
 }
 

kyuubi-server/src/test/scala/org/apache/kyuubi/operation/KyuubiBatchYarnClusterSuite.scala

@@ -80,7 +80,10 @@ class KyuubiBatchYarnClusterSuite extends WithKyuubiServerOnYarn {
     val appInfo = yarnOperation.getApplicationInfoByTag(sessionHandle.identifier.toString)
 
     assert(appInfo("state") === "KILLED")
-    assert(batchJobSubmissionOp.getStatus.state === ERROR)
+
+    eventually(timeout(10.seconds), interval(50.milliseconds)) {
+      assert(batchJobSubmissionOp.getStatus.state === ERROR)
+    }
 
     val resultColumns = batchJobSubmissionOp.getNextRowSet(FetchOrientation.FETCH_NEXT, 10)
       .getColumns.asScala