chore(tests): update S3 compat tests

While present, the S3 compatibility tests were broken (at the very
least when running on Linux) due to a few issues:

- `ubuntu:latest` moving ahead of Python 3.6
- Docker networking not working as expected (host.docker.internal)

This commit fixes the s3 compatibility tests, ensuring they run
properly on linux, and updates the repository to contain some results.

Signed-off-by: vados <vados@vadosware.io>

test/s3/compatibility/Dockerfile

@@ -1,11 +1,21 @@
 # the tests only support python 3.6, not newer
-FROM ubuntu:latest
+#FROM ubuntu:latest
+FROM python:3.6.15-slim-buster
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get install -y git-core sudo tzdata
+# Installed required system deps
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get install -y git-core sudo tzdata
+
+# Install python deps
+RUN pip install virtualenv
+
+# Clone Ceph S3 tests
 RUN git clone https://github.com/ceph/s3-tests.git
+
 WORKDIR s3-tests
 
-# we pin a certain commit
+# Pin to a certain commit on ceph/s3-tests
+# https://github.com/ceph/s3-tests/commit/9a6a1e9f197fc9fb031b809d1e057635c2ff8d4e
 RUN git checkout 9a6a1e9f197fc9fb031b809d1e057635c2ff8d4e
 
 RUN ./bootstrap