Vocabulary database vs. schema

[anthonysena]

We've experienced problems when configuring WebAPI to use an MPP data warehouse (i.e. RedShift) to host the vocabulary since queries are generally queued if there is too much demand.

Instead, we'd propose a dedicated database that hosts the vocabularies you'd like to use in a PostgreSQL backend to configure with WebAPI. In addition, we may want to deprecate the 'vocabulary' daimon from v2.x of WebAPI in favor of this approach since a CDM should already have a vocabulary provided in the cdm schema.