Similar to https://github.com/alphagov/notifications-api/pull/1515
This lets the admin app pass in a domain to use for email auth links,
so that when it’s running on a different URL users who try to sign in
will get an email auth link for the domain they sign in on, not the
default admin domain for the environment in which the API is running.
Removed the tests for trial mode service for the scheduled tasks and the process job.
Having the validation in the POST notification and create job endpoint is enough.
Updated the test_service_whitelist test because the order of the array is not gaurenteed.
accepts a page parameter to control what page of data
returns additional pagination fields in the response dict
* page_size: will always be 50. defined by Config.PAGE_SIZE
* total: the total amount of unpaginated records
* links: dict containing optionally prev, next, and last, links to
other relevant pagination pages
also cleaned up some test imports
moved from notifications/rest -> service/rest and job/rest respectively
endpoint routes not affected
removed requires_admin decorator - that should be set by nginx config
as opposed to python code