HADOOP-18679. Followup: change method name case (#6854)

WrappedIO.bulkDelete_PageSize() => bulkDelete_pageSize()

Makes it consistent with the HADOOP-19131 naming scheme.
The name needs to be fixed before invoking it through reflection,
as once that is attempted the binding won't work at run time,
though compilation will be happy.

Contributed by Steve Loughran

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/wrappedio/WrappedIO.java

@@ -54,7 +54,7 @@ private WrappedIO() {
    * @throws IllegalArgumentException path not valid.
    * @throws IOException problems resolving paths
    */
-  public static int bulkDelete_PageSize(FileSystem fs, Path path) throws IOException {
+  public static int bulkDelete_pageSize(FileSystem fs, Path path) throws IOException {
     try (BulkDelete bulk = fs.createBulkDelete(path)) {
       return bulk.pageSize();
     }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractBulkDeleteTest.java

@@ -69,7 +69,7 @@ public abstract class AbstractContractBulkDeleteTest extends AbstractFSContractT
   public void setUp() throws Exception {
     fs = getFileSystem();
     basePath = path(getClass().getName());
-    pageSize = WrappedIO.bulkDelete_PageSize(getFileSystem(), basePath);
+    pageSize = WrappedIO.bulkDelete_pageSize(getFileSystem(), basePath);
     fs.mkdirs(basePath);
   }
 

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/auth/ITestAssumeRole.java

@@ -735,7 +735,7 @@ private void executeBulkDeleteOnReadOnlyFiles(Configuration assumedRoleConfig) t
 
     bindReadOnlyRolePolicy(assumedRoleConfig, readOnlyDir);
     roleFS = (S3AFileSystem) destDir.getFileSystem(assumedRoleConfig);
-    int bulkDeletePageSize = WrappedIO.bulkDelete_PageSize(roleFS, destDir);
+    int bulkDeletePageSize = WrappedIO.bulkDelete_pageSize(roleFS, destDir);
     int range = bulkDeletePageSize == 1 ? bulkDeletePageSize : 10;
     touchFiles(fs, readOnlyDir, range);
     touchFiles(roleFS, destDir, range);
@@ -769,7 +769,7 @@ private void executeBulkDeleteOnSomeReadOnlyFiles(Configuration assumedRoleConfi
     bindReadOnlyRolePolicy(assumedRoleConfig, readOnlyDir);
     roleFS = (S3AFileSystem) destDir.getFileSystem(assumedRoleConfig);
     S3AFileSystem fs = getFileSystem();
-    if (WrappedIO.bulkDelete_PageSize(fs, destDir) == 1) {
+    if (WrappedIO.bulkDelete_pageSize(fs, destDir) == 1) {
       String msg = "Skipping as this test requires more than one path to be deleted in bulk";
       LOG.debug(msg);
       skip(msg);