add pytest.mark.slow and improve doc

python/test/annotator/embeddings/open_ai_embeddings_test.py

@@ -1,9 +1,24 @@
+#  Copyright 2017-2022 John Snow Labs
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
 import unittest
+import pytest
 from sparknlp.annotator import *
 from sparknlp.base import *
 from pyspark.sql import DataFrame
 from pyspark.sql import SparkSession
 
+@pytest.mark.slow
 class OpenAIEmbeddingsTestCase(unittest.TestCase):
 # Set your OpenAI API key to run unit test...
     def setUp(self):