A handful of bugs popped up while extending the testing in
plans/objchange. The main themes were failing to recurse through deeply
nested NestedType attributes and improperly building up the ImpliedType.
This commit fixes those issues and extends the test coverage to match.
This commit adds a new field, NestedType, to the Attribute schema, and
extends the current Attribute decoderSpec to account for the new type.
The codepaths are mostly unused and included in a separate commit to
verify that the included changes do not impact any other tests yet.
The "config" package is no longer used and will be removed as part
of the 0.12 release cleanup. Since configschema is part of the
"new world" of configuration modelling, it makes more sense for
it to live as a subdirectory of the newer "configs" package.
Kristin Laemmert