This was likely introduced with the refactor to make ColorSchemeColor a database object. Add a test so this doesn't happen again.
Also test other basics of the WizardSerializer.
For some reason, the .as_json left Ruby objects in; I solved this with a round trip through JSON during the test.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
