Support database name for bulkimport (#1262)

Signed-off-by: yhmo <yihua.mo@zilliz.com>

sdk-bulkwriter/src/main/java/io/milvus/bulkwriter/request/import_/CloudImportRequest.java

@@ -34,6 +34,7 @@ public class CloudImportRequest extends BaseImportRequest {
     private String accessKey;
     private String secretKey;
     private String clusterId;
+    private String dbName;
     private String collectionName;
     private String partitionName;
 }

sdk-bulkwriter/src/main/java/io/milvus/bulkwriter/request/import_/MilvusImportRequest.java

@@ -32,6 +32,7 @@ import java.util.List;
 @NoArgsConstructor
 public class MilvusImportRequest extends BaseImportRequest {
     private static final long serialVersionUID = -1958858397962018740L;
+    private String dbName;
     private String collectionName;
     private String partitionName;
     private List<List<String>> files;