Move commonly used params to a config class

[dogversioning]

There are certain values that are used over and over in lots of places:

• schema
• cursor
• parser

We should move these things into a single class, and then pass that around, which should make adding additional widely shared bits of config (like database engine type, which should be moved into this after its created) easier to add in the future if there is a need.

[dogversioning]

this is started by #233