[Backport 8.17] Address integration test failures in Python 3.8 (#3020)

* Address integration test failures in Python 3.8 (#3018)

(cherry picked from commit 67c444c)

* add one more test to the failing list

---------

Co-authored-by: Miguel Grinberg <[email protected]>

Author: github-actions[bot]

test_elasticsearch/test_server/test_rest_api_spec.py

@@ -78,6 +78,8 @@
     "cluster/voting_config_exclusions",
     "entsearch/10_basic",
     "indices/clone",
+    "indices/data_stream_mappings[0]",
+    "indices/data_streams_options[0]",
     "indices/resolve_cluster",
     "indices/settings",
     "indices/split",
@@ -501,7 +503,13 @@ def remove_implicit_resolver(cls, tag_to_remove):
     )
 
     # Download the zip and start reading YAML from the files in memory
-    package_zip = zipfile.ZipFile(io.BytesIO(http.request("GET", yaml_tests_url).data))
+    package_zip = zipfile.ZipFile(
+        io.BytesIO(
+            http.request(
+                "GET", yaml_tests_url, retries=urllib3.Retry(3, redirect=10)
+            ).data
+        )
+    )
 
     for yaml_file in package_zip.namelist():
         if not re.match(r"^.*\/tests\/.*\.ya?ml$", yaml_file):

test_elasticsearch/utils.py

@@ -179,7 +179,7 @@ def wipe_data_streams(client):
 def wipe_indices(client):
     indices = client.cat.indices().strip().splitlines()
     if len(indices) > 0:
-        index_names = [i.split(" ")[2] for i in indices]
+        index_names = [i.split()[2] for i in indices]
         client.options(ignore_status=404).indices.delete(
             index=",".join(index_names),
             expand_wildcards="all",