fix unit test for DATA_TYPE

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

tests/unit/test_metadata_mappings.py

@@ -89,7 +89,7 @@ def test_column_columns_mapping(self):
             "TABLE_SCHEM": ("namespace", SqlType.STRING),
             "TABLE_NAME": ("tableName", SqlType.STRING),
             "COLUMN_NAME": ("col_name", SqlType.STRING),
-            "DATA_TYPE": (None, SqlType.INT),
+            "DATA_TYPE": ("columnType", SqlType.INT),
             "TYPE_NAME": ("columnType", SqlType.STRING),
             "COLUMN_SIZE": ("columnSize", SqlType.INT),
             "DECIMAL_DIGITS": ("decimalDigits", SqlType.INT),