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.
Now that any configuration processing requires schema, we need either a
standalone schema or a provider/provisioner configured with one a lot more
often in tests.
To avoid adding loads of extra boilerplate to the tests, these new helper
functions produce objects pre-configured with a schema that should be
useful for a number of different cases, and can be customized further for
more interesting situations.
A lot of our tests can then just use these pre-defined object and
attribute names in their fixtures in situations where the canned schemas
here are good enough.
