Add pytest option for specifying e2e test Kubernetes version

To run e2e tests with a specific Kubernetes version, use
`--e2e-k8s-version VERSION`.

`tox -e integration_test` will now only e2e tests against the most
recent Kubernetes version, like with `-m e2e_latest` previously.

tests/conftest.py

@@ -24,6 +24,7 @@
 from xdist.scheduler import LoadScopeScheduling
 
 DOCKER_FOR_E2E_OPTION = "--use-docker-for-e2e"
+E2E_K8S_VERSION_OPTION = "--e2e-k8s-version"
 
 pytest_plugins = ['helpers_namespace']
 
@@ -156,6 +157,14 @@ def pytest_xdist_make_scheduler(config, log):
 def pytest_addoption(parser):
     parser.addoption(DOCKER_FOR_E2E_OPTION, action="store_true",
                      help="Run FDD using the latest docker container when executing E2E tests")
+    parser.addoption(E2E_K8S_VERSION_OPTION, action="store",
+                     default="v1.22.4",
+                     help="Run e2e tests against a kind cluster using this Kubernetes version")
+
+
+@pytest.fixture(scope="session")
+def k8s_version(request):
+    return request.config.getoption(E2E_K8S_VERSION_OPTION)
 
 
 @pytest.fixture(scope="session")

tests/fiaas_deploy_daemon/conftest.py

@@ -187,16 +187,3 @@ def _mock_namespace_file_open(name, *args, **kwargs):
     with mock.patch("__builtin__.open") as mock_open:
         mock_open.side_effect = _mock_namespace_file_open
         yield mock_open
-
-
-@pytest.fixture(scope="session", params=(
-    "v1.15.12",
-    "v1.16.15",
-    "v1.18.19",
-    "v1.19.11",
-    "v1.20.7",
-    "v1.21.2",
-    pytest.param("v1.22.4", marks=pytest.mark.e2e_latest)
-))
-def k8s_version(request):
-    yield request.param