Convert Account Activation Emails to edx-ACE

cms/templates/emails/activation_email.txt

cms/templates/emails/activation_email_subject.txt

common/djangoapps/student/helpers.py

common/djangoapps/student/message_types.py

common/djangoapps/student/tasks.py

common/djangoapps/student/tests/test_email.py

common/djangoapps/student/tests/test_tasks.py

common/djangoapps/student/views/management.py

...mplates/student/edx_ace/accountactivation/email/body.html

...emplates/student/edx_ace/accountactivation/email/body.txt

...tes/student/edx_ace/accountactivation/email/from_name.txt

...mplates/student/edx_ace/accountactivation/email/head.html

...lates/student/edx_ace/accountactivation/email/subject.txt

...est_sites/test_site/templates/emails/activation_email.txt

...s/test_site/templates/emails/activation_email_subject.txt

lms/templates/emails/activation_email.txt

lms/templates/emails/activation_email_subject.txt

openedx/core/djangoapps/user_authn/views/login.py

...x/core/djangoapps/user_authn/views/tests/test_register.py