Add new exception types and change to explicitly indetifying fast fail errors

[RichardIrons-neo4j]

This area does need refactoring (there's an ever-expanding else if in there) but for now this should get them failing.

I've added so many reviewers because I'll need a bit of hand-holding, and I'm not sure if I've broken anything here.

[RichardIrons-neo4j]

More error codes should fail fast during discovery