FEATURE: Change email via API without authorization email.

This commit allows someone using the api to change a users email without
generating an email_token and sending an authorization email.

- add 'confirmed' to user_params
- return json response with user_id and updated email
- return json success when using Jobs.enqueue
- test that email validations still work
- test that email token is not created with confirmed flag set
- test that Jobs.enqueue is not called with confirmed flag set
- test that email is update with confirmed flag set
- removes parenthesis from expires_now to be consistant