Intermediate commit:
- Arrange for the catalog schema to be made available during initialization
- Parse the catalog schema, build a transient PEDatabase for it, stuff it onto InformationSchemas
- Arrange for parsing of a view to work correctly prior to full initialization
- Add a single view implemented info schema table (generation_site).
- Start getting execution to work.

Current status:
- Restructuring LogicalSchemaQueryEngine to handle view implemented tables, then can get
  execution working.
- Show plurals is busted
- Figure out how to support show commands (likely adapt current structure)
- Need to break apart info schemas init into a catalog only (for catalog helper) and
  full.  This is required because currently we can't get to the catalog schema without
  hibernate initialization (so upgrade is currently broken).