added special case to handle bucketName (#5971)

Author: Fred1155

test/v2-migration-tests/src/test/resources/software/amazon/awssdk/v2migrationtests/maven/after/src/main/java/foo/bar/S3.java

@@ -375,4 +375,9 @@ private void setBucketConfigs(S3Client s3, String bucket) {
             .build())
             .build());
     }
+
+    private void setBucketNameTest(S3Client s3, String bucket) {
+        GetObjectRequest getObjectRequest = GetObjectRequest.builder().bucket(bucket).key("key").bucket(bucket)
+            .build();
+    }
 }

test/v2-migration-tests/src/test/resources/software/amazon/awssdk/v2migrationtests/maven/before/src/main/java/foo/bar/S3.java

@@ -35,6 +35,7 @@
 import com.amazonaws.services.s3.model.DeleteBucketRequest;
 import com.amazonaws.services.s3.model.GetBucketCrossOriginConfigurationRequest;
 import com.amazonaws.services.s3.model.GetObjectMetadataRequest;
+import com.amazonaws.services.s3.model.GetObjectRequest;
 import com.amazonaws.services.s3.model.HeadBucketRequest;
 import com.amazonaws.services.s3.model.HeadBucketResult;
 import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
@@ -235,4 +236,8 @@ private void setBucketConfigs(AmazonS3 s3, String bucket) {
         s3.setBucketTaggingConfiguration(bucket, new BucketTaggingConfiguration());
         s3.setBucketWebsiteConfiguration(bucket, new BucketWebsiteConfiguration());
     }
+
+    private void setBucketNameTest(AmazonS3 s3, String bucket) {
+        GetObjectRequest getObjectRequest = new GetObjectRequest(bucket, "key").withBucketName(bucket);
+    }
 }

v2-migration/src/main/java/software/amazon/awssdk/v2migration/V1SetterToV2.java

@@ -102,6 +102,10 @@ public J.MethodInvocation visitMethodInvocation(J.MethodInvocation previousMetho
                 methodName = NamingUtils.removeSet(methodName);
             }
 
+            if ("bucketName".equals(methodName)) {
+                methodName = "bucket";
+            }
+
             if (isClientBuilderClass(methodType)) {
                 methodName = CLIENT_CONFIG_NAMING_MAPPING.getOrDefault(methodName, methodName);
             }