[Hotfix][utilities] Optimized codes (#2821)

diff --git a/hudi-utilities/src/main/java/org/apache/hudi/utilities/HDFSParquetImporter.java b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HDFSParquetImporter.java
index 1864795..c9955bd 100644
--- a/hudi-utilities/src/main/java/org/apache/hudi/utilities/HDFSParquetImporter.java
+++ b/hudi-utilities/src/main/java/org/apache/hudi/utilities/HDFSParquetImporter.java
@@ -102,7 +102,7 @@
   }
 
   private boolean isUpsert() {
-    return "upsert".equals(cfg.command.toLowerCase());
+    return "upsert".equalsIgnoreCase(cfg.command);
   }
 
   public int dataImport(JavaSparkContext jsc, int retry) {
diff --git a/hudi-utilities/src/main/java/org/apache/hudi/utilities/checkpointing/InitialCheckpointFromAnotherHoodieTimelineProvider.java b/hudi-utilities/src/main/java/org/apache/hudi/utilities/checkpointing/InitialCheckpointFromAnotherHoodieTimelineProvider.java
index e2554c4..ea366d6 100644
--- a/hudi-utilities/src/main/java/org/apache/hudi/utilities/checkpointing/InitialCheckpointFromAnotherHoodieTimelineProvider.java
+++ b/hudi-utilities/src/main/java/org/apache/hudi/utilities/checkpointing/InitialCheckpointFromAnotherHoodieTimelineProvider.java
@@ -35,7 +35,7 @@
  */
 public class InitialCheckpointFromAnotherHoodieTimelineProvider extends InitialCheckPointProvider {
 
-  private HoodieTableMetaClient anotherDsHoodieMetaclient;
+  private HoodieTableMetaClient anotherDsHoodieMetaClient;
 
   public InitialCheckpointFromAnotherHoodieTimelineProvider(TypedProperties props) {
     super(props);
@@ -44,16 +44,16 @@
   @Override
   public void init(Configuration config) throws HoodieException {
     super.init(config);
-    this.anotherDsHoodieMetaclient = HoodieTableMetaClient.builder().setConf(config).setBasePath(path.toString()).build();
+    this.anotherDsHoodieMetaClient = HoodieTableMetaClient.builder().setConf(config).setBasePath(path.toString()).build();
   }
 
   @Override
   public String getCheckpoint() throws HoodieException {
-    return anotherDsHoodieMetaclient.getCommitsTimeline().filterCompletedInstants().getReverseOrderedInstants()
+    return anotherDsHoodieMetaClient.getCommitsTimeline().filterCompletedInstants().getReverseOrderedInstants()
         .map(instant -> {
           try {
             HoodieCommitMetadata commitMetadata = HoodieCommitMetadata
-                .fromBytes(anotherDsHoodieMetaclient.getActiveTimeline().getInstantDetails(instant).get(),
+                .fromBytes(anotherDsHoodieMetaClient.getActiveTimeline().getInstantDetails(instant).get(),
                     HoodieCommitMetadata.class);
             return commitMetadata.getMetadata(CHECKPOINT_KEY);
           } catch (IOException e) {