adds in private constructor

Author: ahmarsuhail

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AUtils.java

@@ -31,7 +31,6 @@
 import com.amazonaws.services.s3.model.MultiObjectDeleteException;
 import com.amazonaws.services.s3.model.S3ObjectSummary;
 import org.apache.hadoop.classification.VisibleForTesting;
-import org.apache.hadoop.fs.s3a.impl.V2Migration;
 import org.apache.hadoop.util.Preconditions;
 
 import org.apache.commons.lang3.StringUtils;
@@ -44,9 +43,10 @@
 import org.apache.hadoop.fs.PathFilter;
 import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.util.functional.RemoteIterators;
-import org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider;
 import org.apache.hadoop.fs.s3a.auth.delegation.EncryptionSecrets;
+import org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider;
 import org.apache.hadoop.fs.s3a.impl.NetworkBinding;
+import org.apache.hadoop.fs.s3a.impl.V2Migration;
 import org.apache.hadoop.fs.s3native.S3xLoginHelper;
 import org.apache.hadoop.net.ConnectTimeoutException;
 import org.apache.hadoop.security.ProviderUtils;

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/V2Migration.java

@@ -27,6 +27,8 @@
 
 public final class V2Migration {
 
+  private V2Migration() { }
+
   public static final Logger SDK_V2_UPGRADE_LOG = LoggerFactory.getLogger(SDK_V2_UPGRADE_LOG_NAME);
 
   private static final LogExactlyOnce WARN_ON_DELEGATION_TOKENS =

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

@@ -273,8 +273,7 @@ public void testAssumeRoleBadInnerAuth2() throws Exception {
 
     Configuration conf = createAssumedRoleConfig();
     unsetHadoopCredentialProviders(conf);
-    conf.set(ASSUMED_ROLE_CREDENTIALS_PROVIDER,
-        org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider.NAME);
+    conf.set(ASSUMED_ROLE_CREDENTIALS_PROVIDER, SimpleAWSCredentialsProvider.NAME);
     conf.set(ACCESS_KEY, "notvalid");
     conf.set(SECRET_KEY, "notsecret");
     expectFileSystemCreateFailure(conf,