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, 12 insertions, 10 deletions

diff --git a/tests/cloud_tests/verify.py b/tests/cloud_tests/verify.py
index 2a63550e..fc1efcfc 100644
--- a/tests/cloud_tests/verify.py
+++ b/tests/cloud_tests/verify.py
@@ -1,18 +1,19 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.cloud_tests import (config, LOG, util, testcases)
+"""Verify test results."""
 
 import os
 import unittest
 
+from tests.cloud_tests import (config, LOG, util, testcases)
+
 
 def verify_data(base_dir, tests):
-    """
-    verify test data is correct,
-    base_dir: base directory for data
-    test_config: dict of all test config, from util.load_test_config()
-    tests: list of test names
-    return_value: {<test_name>: {passed: True/False, failures: []}}
+    """Verify test data is correct.
+
+    @param base_dir: base directory for data
+    @param tests: list of test names
+    @return_value: {<test_name>: {passed: True/False, failures: []}}
     """
     runner = unittest.TextTestRunner(verbosity=util.current_verbosity())
     res = {}
@@ -53,9 +54,10 @@ def verify_data(base_dir, tests):
 
 
 def verify(args):
-    """
-    verify test data
-    return_value: 0 for success, or number of failed tests
+    """Verify test data.
+
+    @param args: directory of test data
+    @return_value: 0 for success, or number of failed tests
     """
     failed = 0
     res = {}