Integration Testing: tox env, pyxld 2.2.3, and revamp framework

Massive update to clean up and greatly enhance the integration testing
framework developed by Wesley Wiedenmeier.

 - Updated tox environment to run integration test 'citest' to utilize
   pylxd 2.2.3
 - Add support for distro feature flags
   - add framework for feature flags to release config with feature groups
     and overrides allowed in any release conf override level
   - add support for feature flags in platform and config handling
   - during collect, skip testcases that require features not supported by
     the image with a warning message
 - Enable additional distros (i.e. centos, debian)
 - Add 'bddeb' command to build a deb from the current working tree
   cleanly in a container, so deps do not have to be installed on host
 - Adds a command line option '--preserve-data' that ensures that
   collected data will be left after tests run. This also allows the
   directory to store collected data in during the run command to be
   specified using '--data-dir'.
 - Updated Read the Docs testing page and doc strings for pep 257
   compliance

1 files changed, 9 insertions, 7 deletions

diff --git a/tests/cloud_tests/testcases/__init__.py b/tests/cloud_tests/testcases/__init__.py
index a1d86d45..47217ce6 100644
--- a/tests/cloud_tests/testcases/__init__.py
+++ b/tests/cloud_tests/testcases/__init__.py
@@ -1,5 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
+"""Main init."""
+
 import importlib
 import inspect
 import unittest
@@ -9,12 +11,12 @@ from tests.cloud_tests.testcases.base import CloudTestCase as base_test
 
 
 def discover_tests(test_name):
-    """
-    discover tests in test file for 'testname'
-    return_value: list of test classes
+    """Discover tests in test file for 'testname'.
+
+    @return_value: list of test classes
     """
     testmod_name = 'tests.cloud_tests.testcases.{}'.format(
-        config.name_sanatize(test_name))
+        config.name_sanitize(test_name))
     try:
         testmod = importlib.import_module(testmod_name)
     except NameError:
@@ -26,9 +28,9 @@ def discover_tests(test_name):
 
 
 def get_suite(test_name, data, conf):
-    """
-    get test suite with all tests for 'testname'
-    return_value: a test suite
+    """Get test suite with all tests for 'testname'.
+
+    @return_value: a test suite
     """
     suite = unittest.TestSuite()
     for test_class in discover_tests(test_name):