Fix region issue

Author: zoewangg

services-custom/s3-transfer-manager/src/it/java/software/amazon/awssdk/transfer/s3/S3IntegrationTestBase.java

@@ -44,7 +44,7 @@
  */
 public class S3IntegrationTestBase extends AwsTestBase {
 
-    protected static final Region DEFAULT_REGION = Region.US_WEST_2;
+    protected static final Region DEFAULT_REGION = Region.US_WEST_1;
     /**
      * The S3 client for all tests to use.
      */
@@ -92,7 +92,7 @@ private static void createBucket(String bucketName, int retryCount) {
                                    .bucket(bucketName)
                                    .createBucketConfiguration(
                                        CreateBucketConfiguration.builder()
-                                                                .locationConstraint(BucketLocationConstraint.US_WEST_2)
+                                                                .locationConstraint(BucketLocationConstraint.US_WEST_1)
                                                                 .build())
                                    .build());
         } catch (S3Exception e) {

services-custom/s3-transfer-manager/src/main/java/software/amazon/awssdk/transfer/s3/internal/DefaultS3CrtAsyncClient.java

@@ -57,7 +57,7 @@ private DefaultS3CrtAsyncClient(DefaultS3CrtClientBuilder builder) {
                                                         .credentialsProvider(builder.credentialsProvider)
                                                         .build();
 
-        this.s3AsyncClient = initializeS3AsyncClient();
+        this.s3AsyncClient = initializeS3AsyncClient(builder);
     }
 
     @SdkTestInternalApi
@@ -68,12 +68,14 @@ private DefaultS3CrtAsyncClient(DefaultS3CrtClientBuilder builder) {
         this.s3AsyncClient = s3AsyncClient;
     }
 
-    private S3AsyncClient initializeS3AsyncClient() {
+    private S3AsyncClient initializeS3AsyncClient(DefaultS3CrtClientBuilder builder) {
         return S3AsyncClient.builder()
                             // Disable checksum, retry policy and signer because they are handled in crt
                             .serviceConfiguration(S3Configuration.builder()
                                                                  .checksumValidationEnabled(false)
                                                                  .build())
+                            .region(builder.region)
+                            .credentialsProvider(builder.credentialsProvider)
                             .overrideConfiguration(o -> o.putAdvancedOption(SdkAdvancedClientOption.SIGNER,
                                                                             new NoOpSigner())
                                                          .retryPolicy(RetryPolicy.none())