Installed supertest
Moved unit tests to a 'unit' folder.

This should make it easier to run integration tests separately.
Testing POST /users
Can retrieve user by id via http
GET /users returns list of users.
Extractd helpers for creating sample users.
Renamed test name
PUT /users happy path added.
Removed logging from sequelize
Removed errant console.log
Removed old pre-sequelize entities
Role repository can create a role
Does not save a role without a name
Can fetch a role by its id
Can find a role by its name
Lists all roles
Set environment to test in unit tests
Can make HTTP POST to create a user role.
POST /user_roles with no name returns 409 and error message
GET /user_roles returns a list of user roles.