Update profile field and cohort in enrol_user

[rhell4]

Some other plugins like block_enrolkey only call enrol_user so the profile fields and cohort are not updated. These should always be updated when using an enrol key.

Also after unsuspending a user dynamic cohorts were not updated for Totara, so added that piece too for consistency.

Testing instructions;

1. As an admin;
2. Have both auth_enrolkey and block_enrolkey installed
3. Set up an enrol key for a self enrol instance in a course
4. Add the enrol key block to the dashboard
5. Go to Site administration > Plugins > Authentication > Enrolment key based self-registration > Manage enrolkey cohort rules
6. Add at least one cohort and profile field for the enrol key
7. As a student;
8. Login and go to the dashboard
9. Enter the enrol key in the block
10. You should receive a message saying you were enrolled into the course
11. As an admin;
12. Check the student was added to the cohort and the profile field was updated correctly