rename clear to onBecomeLeader

Author: ChenSammi

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/block/DeletedBlockLogImpl.java

@@ -209,7 +209,7 @@ public void reinitialize(
    *  leader.
    */
   public void onBecomeLeader() {
-    transactionStatusManager.clear();
+    transactionStatusManager.onBecomeLeader();
   }
 
   /**

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/block/SCMDeletedBlockTransactionStatusManager.java

@@ -419,7 +419,7 @@ void recordTransactionCreated(DatanodeID dnId, long scmCmdId, Set<Long> dnTxSet)
         .putIfAbsent(txId, new LinkedHashSet<>()));
   }
 
-  public void clear() {
+  public void onBecomeLeader() {
     transactionToRetryCountMap.clear();
     scmDeleteBlocksCommandStatusManager.clear();
     transactionToDNsCommitMap.clear();