[MINOR] Fix Java Lint errors introduced by #13286 and #13280

## What changes were proposed in this pull request?

revived #13464

Fix Java Lint errors introduced by #13286 and #13280
Before:
```
Using `mvn` from path: /Users/pichu/Project/spark/build/apache-maven-3.3.9/bin/mvn
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support was removed in 8.0
Checkstyle checks failed at following occurrences:
[ERROR] src/main/java/org/apache/spark/launcher/LauncherServer.java:[340,5] (whitespace) FileTabCharacter: Line contains a tab character.
[ERROR] src/main/java/org/apache/spark/launcher/LauncherServer.java:[341,5] (whitespace) FileTabCharacter: Line contains a tab character.
[ERROR] src/main/java/org/apache/spark/launcher/LauncherServer.java:[342,5] (whitespace) FileTabCharacter: Line contains a tab character.
[ERROR] src/main/java/org/apache/spark/launcher/LauncherServer.java:[343,5] (whitespace) FileTabCharacter: Line contains a tab character.
[ERROR] src/main/java/org/apache/spark/sql/streaming/OutputMode.java:[41,28] (naming) MethodName: Method name 'Append' must match pattern '^[a-z][a-z0-9][a-zA-Z0-9_]*$'.
[ERROR] src/main/java/org/apache/spark/sql/streaming/OutputMode.java:[52,28] (naming) MethodName: Method name 'Complete' must match pattern '^[a-z][a-z0-9][a-zA-Z0-9_]*$'.
[ERROR] src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java:[61,8] (imports) UnusedImports: Unused import - org.apache.parquet.schema.PrimitiveType.
[ERROR] src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java:[62,8] (imports) UnusedImports: Unused import - org.apache.parquet.schema.Type.
```

## How was this patch tested?
ran `dev/lint-java` locally

Author: Sandeep Singh <sandeep@techaddict.me>

Closes #13559 from techaddict/minor-3.

1 files changed, 4 insertions, 4 deletions

diff --git a/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
index 28e9420b28..ae43f563e8 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
@@ -337,10 +337,10 @@ class LauncherServer implements Closeable {
       }
       super.close();
       if (handle != null) {
-    	if (!handle.getState().isFinal()) {
-    	  LOG.log(Level.WARNING, "Lost connection to spark application.");
-    	  handle.setState(SparkAppHandle.State.LOST);
-    	}
+        if (!handle.getState().isFinal()) {
+          LOG.log(Level.WARNING, "Lost connection to spark application.");
+          handle.setState(SparkAppHandle.State.LOST);
+        }
         handle.disconnect();
       }
     }