Fix python dockerpy tests

* Refactor packaging so unittest discovery works
* Refactor tests to use python3-docker.rpm that ships with Fedora32
* Flush image cache between tests suites
* Update documentation to reflect changes

Outstanding issue:
* client.get_image() does not fail if image does not exist

Signed-off-by: Jhon Honce <jhonce@redhat.com>

test/python/dockerpy/tests/test_info_version.py

@@ -0,0 +1,44 @@
+import unittest
+
+from . import common, constant
+
+client = common.get_client()
+
+
+class TestInfo_Version(unittest.TestCase):
+
+    podman = None
+    topContainerId = ""
+
+    def setUp(self):
+        super().setUp()
+        common.restore_image_from_cache(self)
+        TestInfo_Version.topContainerId = common.run_top_container()
+
+    def tearDown(self):
+        common.remove_all_containers()
+        common.remove_all_images()
+        return super().tearDown()
+
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        common.enable_sock(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        common.terminate_connection(cls)
+        return super().tearDownClass()
+
+    def test_Info(self):
+        self.assertIsNotNone(client.info())
+
+    def test_info_container_details(self):
+        info = client.info()
+        self.assertEqual(info["Containers"], 1)
+        client.create_container(image=constant.ALPINE)
+        info = client.info()
+        self.assertEqual(info["Containers"], 2)
+
+    def test_version(self):
+        self.assertIsNotNone(client.version())