Add Strict Metaschema Validation (#1101)

Improve schema validation.

This adds strict validation of config module definitions at testing
time, with plumbing included for future runtime validation. This
eliminates a class of bugs resulting from schemas that have definitions
that are incorrect, but get interpreted by jsonschema as
"additionalProperties" that are therefore ignored.

- Add strict meta-schema for jsonschema unit test validation
- Separate schema from module metadata structure
- Improve type annotations for various functions and data types

Cleanup:
- Remove unused jsonschema "required" elements 
- Eliminate manual memoization in schema.py:get_schema(),
        reference module.__doc__ directly

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/unittests/cmd/test_clean.py b/tests/unittests/cmd/test_clean.py
index 81fc930e..3bb0ee9b 100644
--- a/tests/unittests/cmd/test_clean.py
+++ b/tests/unittests/cmd/test_clean.py
@@ -137,7 +137,7 @@ class TestClean(CiTestCase):
                 clean.remove_artifacts, remove_logs=False)
         self.assertEqual(1, retcode)
         self.assertEqual(
-            'ERROR: Could not remove %s/dir1: oops\n' % self.artifact_dir,
+            'Error:\nCould not remove %s/dir1: oops\n' % self.artifact_dir,
             m_stderr.getvalue())
 
     def test_handle_clean_args_reboots(self):