HADOOP-15972 ABFS: reduce list page size to to 500.

Contributed by Da Zhou.

hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java

@@ -107,7 +107,7 @@ public class AzureBlobFileSystemStore {
   private String primaryUserGroup;
   private static final String DATE_TIME_PATTERN = "E, dd MMM yyyy HH:mm:ss 'GMT'";
   private static final String XMS_PROPERTIES_ENCODING = "ISO-8859-1";
-  private static final int LIST_MAX_RESULTS = 5000;
+  private static final int LIST_MAX_RESULTS = 500;
   private static final int DELETE_DIRECTORY_TIMEOUT_MILISECONDS = 180000;
   private static final int RENAME_TIMEOUT_MILISECONDS = 180000;
 

hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestAbfsClient.java

@@ -28,7 +28,7 @@ import org.junit.Test;
  * Test continuation token which has equal sign.
  */
 public final class ITestAbfsClient extends AbstractAbfsIntegrationTest {
-  private static final int LIST_MAX_RESULTS = 5000;
+  private static final int LIST_MAX_RESULTS = 500;
 
   public ITestAbfsClient() throws Exception {
     super();