Adds integration tests for the job type.

Enable debug on schema based on debugEnabled() helper function.

Removes an unused import

Includes new rules to protect job mutations.

Remove an unused import

Includes the mutations for jobs

Includes a helper function for debugging

Includes the field departmentId on type Job.

Refactors some helper functions and includes some others.

New functions to create Users and Departments

Changes to use Role Enum

Includes department integration tests

Includes department mutations

Move hashPassword to a helper function

Major changes on Users Tests.