Adding Sipity::Jobs.submit

Providing an interface point between the job layer and the rest of the
application.
Leveraging Sipity::Jobs layer for submitting jobs
Randomizing specs

I can't believe they weren't but now they are.
Ensuring that DoiMethods run

Without the explit `require 'spitiy/jobs'` and with the following:

$ rspec --seed 2747

I was getting four errors. Adding this behavior. Perhaps need to look
into the autoload of constants?
Adding autoload_paths
Adding explicit error for Policy not found
Adding TODO items

[skip ci]