Allow users to update their email address (#1745)

* Change email address

* Email confirmation

* Email change test

* Lint

* Schema reset

* Set test email sender

* Select specific user fixture

* Refactor/cleanup

* Remove unused email_confirmation_token

* Current user would never be true

* Fix translation test failures

test/fixtures/users.yml

@@ -30,4 +30,13 @@ family_member:
   last_name: Dylan
   email: jakobdylan@yahoo.com
   password_digest: <%= BCrypt::Password.create('password') %>
-  onboarded_at: <%= 3.days.ago %>
+  onboarded_at: <%= 3.days.ago %>
+
+new_email:
+  family: empty
+  first_name: Test
+  last_name: User
+  email: user@example.com
+  unconfirmed_email: new@example.com
+  password_digest: <%= BCrypt::Password.create('password123') %>
+  onboarded_at: <%= Time.current %>